1) Anyone facing issues with velocity boundary conditions and lack of data for creating an amplitude, could resort to defining a "predefined field". It works fine! 2) Also I suggest using Analytical rigid instead of discrete rigid if the impactor could be modelled as an extruded/revolved shell. Analytical rigid gives more accurate results than discrete imo. 3) Take care of the mesh size as well. Check if its an element or node that is present at the impact point. Its highly sensitive to the results.
Hi Sanan I tried the this example with 3D hashin criteria. I tried to output "RF3" (Reaction force) for the rigid body node set, but when I plot them in Abaqus/CAE, all the RF3 values are zero with respect to time. can u please tell me how to overcome this.
Hello, thank you for your video. But I'm confused that what the contact properties between two layers is. Or do they need to be tied each other? Thank you!
I am getting displacement greater than the value specified in paper. my graph trend is quite correct but time in Force-time curve is shifted by some value. so what should I do to get my composite stiffer so that I'll get FT curve properly.
Hi, Sanan. Pretty good job, thanks for sharing this technical video to us, really helpful. I'm now simulating a steel joint subjected to impact loading on the brace end. As you know, dynamic property of the steel, such as yield strength, is quite different from that of static. It will be strengthened by the strain rate of the steel associated with velocity. The strain rate needs to follow laws of Cowper -Symonds or Johnson Cook. My question is how to assign the strain rate according to the law of like Cowper-Symonds in ABAQUS? Thanks!!!
Thanks for making this great video. It helps a lot. I got an error when I was using the surface-based contact to simulate the delamination between continuum shell composite model saying that the general contact can be given a property with cohesive or damage. In this video, you solved it by assigning a fake properties. But I tried in Abaqus/standard. It doesn't work, then can you tell me what I can do?
I have yet to be able to find one of your previous videos that actually goes through the properties used for the "COMPOSITE" material, and I have searched.
Maybe someone faced my problem which I could solve it. I used data for amplitude in Load section and I finished everything but when I wanted to submit my job I faced the following error: "The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 1 instance COMP-0-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data." After searching, I used "assign stack direction" command in mesh section for each layer (before using this command you should click on "part" command on top of mesh section in object command and don't use assembly command ). after clicking on "assign stack direction" choose a part of a layer (for example we had 4 parts for each layer in this tutorial video) then click on the top surface of that part that is brown or near brown surfaces and do this step for each part of layer.
Thanks for taking your time for such an informative video which is hard to find anywhere else. Really appreciate you for spending so much time. Some comments which would be useful : 1. Try to mention the video title name when you refer to other videos of yours, as it creates a bit of confusion. 2. The interaction property you are referring in this video is explained in the 'Modeling with discussion : tensile loading of fiber metal laminates', but it talks only about a layer to layer interaction, and doesnt talk about 0 layer to 90layer, which i think is really important.
Dear Sanan khan in this video you mentioned you have already explained about the composite lay up interface. can you please tell which special earlier video because i am just a beginner with the composites modeling. thank you so much
Thank you so much sir. but in that video the material properties are already assigned to parts. So i didnt get how to assign these peroperties. can you give me some links of documents or video that can help in basics of composites modeling
hello sir first thanks a lot for sharing such tutor. but i have some question. when i increase the mesh density(very fine) , the final solution is start diverge and the ALLIE graph is highly fluctuated. and also when am using stabilization (1e-05) to all, the ALLVD are very high when compared to ALLIE. what shall i do? , and if its possible please give me the correct stabilization coefficient. thanks
Dear Sanan khan in this video you mentioned you have already explained about the composite lay up interface. can you please tell which special earlier video because i am just a beginner with the composites modeling. thank you so much
Hello i have tried this video but i have a problem in interaction; as the comp0-1 comp90-1 comp90-2 comp0-2 are not exist in "Edit individual contact property ( comp90-1, comp90-2) are not found i need a help please , thanks a lot
Sir, I don't have the experimental results of Amplitude and time. Instead of that I'm using the negative velocity for the impactor as u said in the video. But I'm not getting the solution done
Hello sir, instead of drop weight i need to have a spring mass system to impact on the composite. how do i model single degree of freedom spring mass system to impact on the component. please help me with this. Thank you
Hi Sanan can u please give an interaction properties for 0-90 lamina & 0-0 lamina i am modelling sandwich structure where can i get the interaction properties for foam (rohacell) and 0 laminate.
Sir can you please provide Time/amplitude files or can you give any reference journal so I can use those, as I am using with predefined field so getting wrong graph
I followed your tutorial but when I submit the Job, the results that I am getting show that the kinetic energy is constant throughout which does not make sense. How can I fix this issue? What could be going wrong?
Can you provide the video link to the interaction property between the tup and the 0 degree lamina, and the fake interaction property as well? Can't seem to find them on your old videos. Thanks.
Hello sir, I want to model a reinforced concrete beam in Abaqus without using Rebar, I want to assign only area of steel as a whole to the beam, so later I can use the area of steel to design the rebar using design software? How to design this model in Abaqus? Can I use composite beam or? Please help me if possible. Thank you.
Hello, could you please provide all the layer to layer interaction property ? I found that in your previous videos just mentioned L2L and M2L interactions only. Or if it is possible , could you send me your Abaqus model ? Thank you so much.
Anybody help me? When I apply velocity (instantaneous) in this model. The force seems to be ok but the velocity in output is constant . I think it is not true. The velocity in output must be changed. Can anybody explain me why and give me the solution to overcome this problem. Thank you so much!
Hi I have followed all the steps but I am not getting force reaction on RP. My RF3 plot is a flat line on 0. I am getting values for RF1/RF2 and magnitude but nothing in 0 direction. What am I doing wrong?? Any leads???
Thank you for your great job in this model. Could you please inform me how to overcome the error that appeared at time 40:20 minute in the video? Also, could you please upload the link for your previous video that shows the material properties used in this model?
about the error: I don't think it's an error. perhaps a poor modeling analogue. you can improve it by taking full model in account. For the video, check out the tensile response video on my TH-cam page.
Thanks sir for wonderful vedio, can you pls share the link of vedio where you have filled the data in property module about COMPOSITE, bcz you have not shown here how to fill damage evolution and all thanks
this is debatable. since a velocity is not instantaneous and it is controlled. with the applied mass. I don't see a point in applying gravity. that will add up to the energy.
Sir, I do have one more doubt when we are working on crash analysis of composite tube using hashin damage criterion .....whether we need to give input of plastic data i mean stress vs strain data after yield point.
Hi, I tried to model a low velocity impact with the same mesoscale approach you showed in the video but despite I adopted your same approach a compenetration of plies under the impactor occurs. Also very high values of ALLVD and ALLPW resulted...What could be the cause?
Allvd hints you about the viscous dissipation energy. High value compared to internal energy ( more than 1 %) signifies large deformation and hence large value of stabilization to avoid element failure. Allpw is plastic work which is fine if you have large plastic deformation.
Hi Sanan, I am trying to simulate the same situation shown in this video but i am getting the error " The elements contained in element set ErrElemExcessDistortion-Step-1 have distorted excessively"...Can you help me out in overcoming this
hi i simulated low velocity impact on a composite plate. the problem is that optained viscous diss. energy ALLVD is too high, almost as internal energy, also total energy changes a little however its change is too small compared to internal energy. do you know how can i fix this? thank you in advance.
am modeling on 3d solid model using composite properties but i got this error message " Element 1 instance temp-doooooor-new-1: layered material properties can not be specified for this element type". my question is if i want model a composite am i obliged to design it on layers and use shell model? if not how can i fix this problem?
Hi Sanan, I am doing a research on impact simulation of coir composites. Do you think that the built-in Hashin damage model criteria can be used? I have some doubt especially about the matrix damage criteria
Hi Sanan , I've encountered this error "When a sensor is defined only one output variable can be used for a particular output request since sensor names have to be unique. Please verify input." Do you know why?
Hi Sanan, Thank your for your wonderful videos. Could you please cite the papers you are referring to? I mean the Duran et al. if I'm not mistaken and the one you are referring for longitudinal shear stress. Thanks again.
Hi Sanan, I am doing a research on impact simulation of kevlar fabric composites. Do you think that the built-in Hashin damage model criteria can be used for plain weave fabric reinforced composites. I have some doubt especially about the matrix damage criteria. Is there any other damage model available for plain weave fabric reinforced composites?
Nooruddin Sadruddin No it's for UD. for plane weave use max stress or Tsai Wu envelopes. for mode wise failure yen and caiazzo criteria is there. some uses Hashin also but didn't explain the reason. though abaqus has inbuilt vumat subroutine for it and can be used.
Thanks Sanan for clearing up my doubts. I have tried using the inbuilt VUMAT. I read here ( www.researchgate.net/file.PostFileLoader.html?id=53823bc1d2fd644c4f8b46ec&assetKey=AS%3A273538722795522%401442228121981 ) that it can be employed by naming the material abq_ply_fabric but its not working. Have you ever tried using this VUMAT. And if so, can u please share how. Again thanks for replying to my question.
Thanks a lot for sharing such a rare advanced simulation case. Could you please provide the link to your previous video? Or could you please provide just the material paramters that you defined as "Composite", especially damage evolution and damage stabilization? (P.S. You should make the video self-contained. Trying to refer the audience to the previous video without specifiying which one or giving the link makes this tutorial less interesting.)
Hi! i became the error about the Orientation. It is: The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 4800 instance KOMPO_-45-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data. What should i do? Thanks a lot.
Maybe someone faced my problem which I could solve it. I used data for amplitude in Load section and I finished everything but when I wanted to submit my job I faced the following error: "The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 1 instance COMP-0-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data." After searching, I used "assign stack direction" command in mesh section for each layer (before using this command you should click on "part" command on top of mesh section in object command and don't use assembly command ). after clicking on "assign stack direction" choose a part of a layer (for example we had 4 parts for each layer in this tutorial video) then click on the top surface of that part that is brown or near brown surfaces and do this step for each part of layer.
Hi Sanan, Here your modelling only one forth (1/4th) of the domain because of symmetry. But while assigning the inertia properties to the tup you entered half (1/2) of the original mass. To my understand we have to assign one forth (1/4) of the original mass of the tup. please correct me if i am wrong.
Hello sir Can u please provide me with the spreadsheet that you used as an input for velocity profile . I am facing problems of distortion when i entered the instantaneous velocity thanks in advance
hi . Sanan .. i had this error and couldn't fix it ..please help "1 nodes have dof on which velocity/displacement/acceleration/base motion etc. constraints are specified simultaneously. The nodes have been identified in node set ErrNodeBCRedundantDof."
hi, thank you so much for the video, would you mind please send me the paper mentioned in this video? Standard Test Method for Measuring the Damage Resistance of a Fiber-Reinforced Polymer Matrix Composite to a Drop-Weight Impact Event
at 19.54 "edit individual contact property assignment" the properties in 3rd column how these were created in previous videos? can any body help please
Respected sir, I tried to do the same but i am getting an error as "1 nodes have dof on which velocity/displacement/acceleration/base motion etc. constraints are specified simultaneously. The nodes have been identified in node set ErrNodeBCRedundantDof.' I would be glad if u could kindly help me in solving it.
Hi Sanan. I have performed impact analysis using both solid elements and Continuum shell elements. In your opinion, besides the computational time, which technique is preferable considering through thickness stresses and 3D stresses.
Manzar Masud hello manzar. i have tried using solid element for this problem. always get the error 'element missing property definition'. i also read somewhere that hashin damage can only be used with shell element. can u guide me how u used solid elements
Yes. u are right. Hashin can only be used with shell elements. If you want to use hashin with solid elements, u have to write your own user defined subroutine. Hashin will not work with solid elements.
let me come in. i happen to miss the comments :). for out of plane problem like impact shell elements are not sufficient. they does not have sigma33 tensorial component which is the most dominating in that case. so the difference will be obvious. make your own subroutine. it will be a new learning process. if i got time i will try posing a video on it.
Sanan H Khan A video about writting Vumat would be grt help indeed. also have u done any composite impact problems in lsdyna or autodyn. Do the built-in material models in these solvers support solid elements with hashin or other composite damage models?
Hi Sanan I am using instantaneous velocity for the tup. As you mentioned i am using a Step 1 to assign a positive velocity and created one more step viz. Step 2 to assign negative velocity. In both the steps i am assigning velocity same Reference point. After submitting the job the following error is coming. 1 nodes have dof on which velocity/displacement/acceleration/base motion etc. constraints are specified simultaneously. The nodes have been identified in node set ErrnodeBCRedundant Dof. Please help me to avoid this error.
hi sanan. Thanks for the video. Well i have two questions. i. As i do not have the amplitude data , so i have applied the initial velocity as 2.51 m/s. I can not apply the +2.51 m/s and -2.51 m/s on the same step. So please tell me what should i do? As with only 2.51 m/s, my impactor is going in the one side only and not coming back. ii. My V3 vs time plot is constant at 2.51 m/s and U3 is also showing a straight line slope which is not correct. RF3 is showing good response. If you can comment on above mentioned, I shall be grateful.
Manzar Masud moreover, the velocity will remain constant. it is your b.c. so it will. remember that the output is on the r.p. as per the video so it will strictly follow the impactor.
I M STRUGGLING WITH SAME HOW MANY HOURS IT WILL TAKE TO COMPLETE THE RUN ACTUALLY I M WORKING ON SANDWICH COMPOSITE SO IS THERE NEED TO PROVIDE CONSTRAINT BETWEN SANDWICH LAYERS,,,,,,,......................
it depends upon your mesh and no of elements. check the stable time increment in the status file. if it is below 1e-8 try mass scaling the 'bad' elements. for this video, job took 20 hours to complete with intel i7 2.93Gzh with parallel processing.
thanks a lot sir.......... also sir i want to know is the velocity or mass make significant effect in analysis and how can be get the energy to bending, shear and indentation effect in this analysis. also here the impactor is not coming in the rest that means the energy of the impactor is always constant, this will not convert in to shear, bending or indentation energy..................
Dear sanan It is mentioned in this video that contact property for L2L-0/0 , L2L-0/90, L2L-90/90 were different. But reference for contact properties were given as previous video, in that video only M2L and L2L properties are given. For different laminate layers L2L properties were used. (th-cam.com/video/o35aO8mONOU/w-d-xo.html) what will be the difference if orientation changes ? Thank you regards Lal Krishna G
Hello sir, Thank you for the video. It was really helpful. I'm trying to model the impact of a spear into soil. Every time, the job aborts due to excessive deformation. Can you please give some idea on how to avoid it.
check the soil props. mesh finer. if spear has pointed nose. mesh the region below it even finer. use penalty contact. apply stabilization. in the status file check which element is failing. does it fail by distortion or rotation. try more resent version.
I am stuck at 19.03, when i click OK, it states: The interaction property must be set for contact interactions. Click MB3 over the table and select Create Property. can someone help me out here. thanks
Hi there, I am modelling a composite as shown in the video for a coupled thermal electric problem. i have modeled it, assembled it and meshed it as shown in the video But during the analysis i get the error "elements have missing property definitions". Can you kindly help me through this?
Sir, What is the difference between in-plane shear strength of lamina and longitudinal shear strength and also how to find transverse shear strength of lamina if i know rest of strength properties.Please attach if any files are to corresponding calculation
when you consider plane...shear on that will be in plane like plane 1-2..then shear tau12...and longitudinal means in the fiber direction..i.e if fiber is in1 direction then 12...if fiber in 2 then 23...transverse shear strength tau23 is approx 0.3 times compressive strength of matrix considering 1 as fiber direction.
Hello Sanan, I have noticed you have several Sets, materials, Amplitudes already in the model before you start the tutorial. It would be very helpful if you could provide this information on an external link. every tutorial is very long to go check another two or three one hour tutorial looking for the properties.
I've tried that also, still got zero value. by the way, for the displacement constraint on the RF, should I put the value along U3 or just leave it zero?
Hello, I have the same problem. Actually as an exercise I request RF1, RF2 and RF3. I do get an output for RF1, and RF2, but not on the 3 direction. Any suggestions how to overcome this? I am following the steps as stated in this tutorial.
thanku sir.. i rectified that error..but still one problem is there,It is not showing the results,instead of that my tup is simply penetrating in to the composite layer. why it is so sir..?
Hello! I am trying to model Cold Gas Spray using Abaqus, is there any way you could help me with that? Im having some concerns regarding the interaction of elements. If you could provide me with your email I would be more than happy to ask you a couple of questions. Also, great video!
@@SanaanKhan I have activated csdmg before this and then how to transform the shape of delamination to be plotted in graph and use polynomial area method..your help is appreciated.
![[Live สด] การออกรางวัลสลากกินแบ่งรัฐบาล งวดวันที่ 16 กรกฎาคม 2567](http://i.ytimg.com/vi/B8gcGM6I6e4/mqdefault.jpg)
1) Anyone facing issues with velocity boundary conditions and lack of data for creating an amplitude, could resort to defining a "predefined field". It works fine!
2) Also I suggest using Analytical rigid instead of discrete rigid if the impactor could be modelled as an extruded/revolved shell. Analytical rigid gives more accurate results than discrete imo.
3) Take care of the mesh size as well. Check if its an element or node that is present at the impact point. Its highly sensitive to the results.
😇
In which video have you defined the "tup-impact" interaction property?
thanks a lot sir, this is very good and elaborate work, respect.
Hi Sanan
I tried the this example with 3D hashin criteria. I tried to output "RF3" (Reaction force) for the rigid body node set, but when I plot them in Abaqus/CAE, all the RF3 values are zero with respect to time.
can u please tell me how to overcome this.
Hello, thank you for your video. But I'm confused that what the contact properties between two layers is. Or do they need to be tied each other? Thank you!
I am getting displacement greater than the value specified in paper. my graph trend is quite correct but time in Force-time curve is shifted by some value. so what should I do to get my composite stiffer so that I'll get FT curve properly.
merci c'est top
et bon courage
It was helpfull and intersting thanks a lot
Hi, Sanan. Pretty good job, thanks for sharing this technical video to us, really helpful. I'm now simulating a steel joint subjected to impact loading on the brace end. As you know, dynamic property of the steel, such as yield strength, is quite different from that of static. It will be strengthened by the strain rate of the steel associated with velocity. The strain rate needs to follow laws of Cowper -Symonds or Johnson Cook. My question is how to assign the strain rate according to the law of like Cowper-Symonds in ABAQUS? Thanks!!!
Thanks for making this great video. It helps a lot.
I got an error when I was using the surface-based contact to simulate the delamination between continuum shell composite model saying that the general contact can be given a property with cohesive or damage. In this video, you solved it by assigning a fake properties. But I tried in Abaqus/standard. It doesn't work, then can you tell me what I can do?
Hi Sanan. Do you have any idea about the compression after impact analysis ? I need to ask some information.
Hi..! Thank you for uploading this video.. just one thing i would like to ask how you have done force normalisation part ??
I have yet to be able to find one of your previous videos that actually goes through the properties used for the "COMPOSITE" material, and I have searched.
could you please link the video in which you defined property interaction between different plies ?
From where can I find the contact property between 0/90 layer?
Maybe someone faced my problem which I could solve it. I used data for amplitude in Load section and I finished everything but when I wanted to submit my job I faced the following error:
"The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 1 instance COMP-0-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data."
After searching, I used "assign stack direction" command in mesh section for each layer (before using this command you should click on "part" command on top of mesh section in object command and don't use assembly command ). after clicking on "assign stack direction" choose a part of a layer (for example we had 4 parts for each layer in this tutorial video) then click on the top surface of that part that is brown or near brown surfaces and do this step for each part of layer.
sir, when i was checking mesh stack orientation ...it is showing that there are boundaries with inconsistent orientation !!
sir, how to use rebound velocity since i don't have velocity time history?
Thanks for taking your time for such an informative video which is hard to find anywhere else. Really appreciate you for spending so much time. Some comments which would be useful :
1. Try to mention the video title name when you refer to other videos of yours, as it creates a bit of confusion.
2. The interaction property you are referring in this video is explained in the 'Modeling with discussion : tensile loading of fiber metal laminates', but it talks only about a layer to layer interaction, and doesnt talk about 0 layer to 90layer, which i think is really important.
taken
Dear Sanan khan in this video you mentioned you have already explained about the composite lay up interface. can you please tell which special earlier video because i am just a beginner with the composites modeling. thank you so much
Imran Ali hello, it's there in the video called tensile loading
Thank you so much sir. but in that video the material properties are already assigned to parts. So i didnt get how to assign these peroperties. can you give me some links of documents or video that can help in basics of composites modeling
hello sir
first thanks a lot for sharing such tutor. but i have some question.
when i increase the mesh density(very fine) , the final solution is start diverge and the ALLIE graph is highly fluctuated. and also when am using stabilization (1e-05) to all, the ALLVD are very high when compared to ALLIE. what shall i do? , and if its possible please give me the correct stabilization coefficient. thanks
Sir can I use the same step for high velocity impact on composite
Dear Sanan khan in this video you mentioned you have already explained about the composite lay up interface. can you please tell which special earlier video because i am just a beginner with the composites modeling. thank you so much
Hello
i have tried this video but i have a problem in interaction; as the
comp0-1
comp90-1
comp90-2
comp0-2
are not exist in "Edit individual contact property ( comp90-1, comp90-2) are not found
i need a help please , thanks a lot
Sir, I don't have the experimental results of Amplitude and time. Instead of that I'm using the negative velocity for the impactor as u said in the video. But I'm not getting the solution done
Hello sir, instead of drop weight i need to have a spring mass system to impact on the composite. how do i model single degree of freedom spring mass system to impact on the component. please help me with this. Thank you
Hi Sanan can u please give an interaction properties for 0-90 lamina & 0-0 lamina
i am modelling sandwich structure where can i get the interaction properties for foam (rohacell) and 0 laminate.
Sir can you please provide Time/amplitude files or can you give any reference journal so I can use those, as I am using with predefined field so getting wrong graph
Hello Sanan ,do you have any vıdeo about blast loading? Thanks!
Can you share the link of all the previous videos you are taking about. Plz..
what's the point to create a 90 degree composite plate..why you don't copy it without changing the angle
is possible to do same analysis in ansys apdl
Could someone please explain to me how the Amplitude Values were generated '27:27'?
I followed your tutorial but when I submit the Job, the results that I am getting show that the kinetic energy is constant throughout which does not make sense. How can I fix this issue? What could be going wrong?
Can you provide the video link to the interaction property between the tup and the 0 degree lamina, and the fake interaction property as well? Can't seem to find them on your old videos. Thanks.
int b/w tup and 0deg laminate is hard contact with friction while fake is friction less
Sir, how to get damage evaluation values of composite in abaqus.....
Hello sir, I want to model a reinforced concrete beam in Abaqus without using Rebar, I want to assign only area of steel as a whole to the beam, so later I can use the area of steel to design the rebar using design software? How to design this model in Abaqus? Can I use composite beam or? Please help me if possible. Thank you.
Hello, could you please provide all the layer to layer interaction property ? I found that in your previous videos just mentioned L2L and M2L interactions only. Or if it is possible , could you send me your Abaqus model ? Thank you so much.
what is the layer to layer property here ??
Hello sanan bhai, I tried your tutorial it works for me, however the impactor is not penetrating in the composite laminates. Why?
Anybody help me?
When I apply velocity (instantaneous) in this model. The force seems to be ok but the velocity in output is constant .
I think it is not true. The velocity in output must be changed. Can anybody explain me why and give me the solution to overcome this problem.
Thank you so much!
Hi there, could you pls tell me the COMPOSITE properties been used during minutes 7.00 in this video?
+Zamri Nasir Please check out the video
th-cam.com/video/o35aO8mONOU/w-d-xo.html
@@SanaanKhan Dear Sir, I want to analyse E-glass grp with epoxy resin. Should i use these properties for the analysis.
Hi
I have followed all the steps but I am not getting force reaction on RP. My RF3 plot is a flat line on 0. I am getting values for RF1/RF2 and magnitude but nothing in 0 direction. What am I doing wrong?? Any leads???
Hello Sanan Sir, Can I get input file of this simulation?
Thank you for your great job in this model.
Could you please inform me how to overcome the error that appeared at time 40:20 minute in the video?
Also, could you please upload the link for your previous video that shows the material properties used in this model?
about the error: I don't think it's an error. perhaps a poor modeling analogue. you can improve it by taking full model in account. For the video, check out the tensile response video on my TH-cam page.
Hi Sanan,
Do you know what changes do I need to do, if I am modelling using a PVC foam instead?
thanks
+Kevin “kevin94” Poh PVC foam material will come in to picture and i think you don't need delamination then.
hi Sanan, very good video. but i want to ask why rf3 from the tup is positive in your result.. rather than negative...
+chen wang the downward direction is positive. is their something wrong ?
will you please a video on fracture of composite material?
Thanks sir for wonderful vedio, can you pls share the link of vedio where you have filled the data in property module about COMPOSITE, bcz you have not shown here how to fill damage evolution and all
thanks
you didn't show property completely! I couldn't see density, young's module, poison, E, Nu and G!!
Very nice explanation of the procedure and results..Well done..Did you also consider applying gravity on the bullet and specimen?
this is debatable. since a velocity is not instantaneous and it is controlled. with the applied mass. I don't see a point in applying gravity. that will add up to the energy.
Sir can you upload any tutorial about how to aplly dynamic loading and finding output at particular potion of model
assalaamu alaikum
can you please explain how to do modelling of composite fiber at individual fiber level ....
Good job
how you created interactions L2L, M2L you haven't specified that can you give some clarity on this please
Sir, I do have one more doubt when we are working on crash analysis of composite tube using hashin damage criterion .....whether we need to give input of plastic data i mean stress vs strain data after yield point.
try using JC failure
Hi Sanan,
Why you take the mass equal to half of impactor mass?
Suhairil Meon it's not half. It's 1/4 of the impactor mass. I have spoken it incorrectly
Hi, I tried to model a low velocity impact with the same mesoscale approach you showed in the video but despite I adopted your same approach a compenetration of plies under the impactor occurs. Also very high values of ALLVD and ALLPW resulted...What could be the cause?
Allvd hints you about the viscous dissipation energy. High value compared to internal energy ( more than 1 %) signifies large deformation and hence large value of stabilization to avoid element failure. Allpw is plastic work which is fine if you have large plastic deformation.
Thank you for uploading this video.. Can I get the sheet excel in this video?... please I need the amplitude data...
i need hw to creat fsw friction stir welding please
Hi Sanan, I am trying to simulate the same situation shown in this video but i am getting the error " The elements contained in element set ErrElemExcessDistortion-Step-1 have distorted excessively"...Can you help me out in overcoming this
from which video do you get the intraction property
Please help with property defining of L2L-0/0, L2L-90/90 and L2L-0/90
hi
i simulated low velocity impact on a composite plate. the problem is that optained viscous diss. energy ALLVD is too high, almost as internal energy, also total energy changes a little however its change is too small compared to internal energy.
do you know how can i fix this?
thank you in advance.
+mohammad reza mohammadi have you used infinite elements ?? if not then, in step--edit---other tab--put linear and quad 0...check it then.
Hi,could you pleas tell me what's composite name that you used in video ?
thank you
e-glass fiber with epoxy
am modeling on 3d solid model using composite properties but i got this error message " Element 1 instance temp-doooooor-new-1: layered material properties can not be specified for this element type". my question is if i want model a composite am i obliged to design it on layers and use shell model? if not how can i fix this problem?
you are forced to use shell elements.
ah ok thank you sir
how can i repeat the drop?
Hi Sanan, you mention that 3d Hashin UMAT is available in abaqus website... can you please provide a link?
+adelia Sinaga in one of the forum discussion i have seen..
abaqus-users.1086179.n5.nabble.com/Helping-in-VUMAT-Urgent-td11548.html
hello sir, in which video i can find the interaction property L2l-0/0 ,L2l-0/90 and L2l-90/90
hi bro! same doubt about how the contact props are created. Did you figured out?
Hi Sanan, I am doing a research on impact simulation of coir composites. Do you think that the built-in Hashin damage model criteria can be used? I have some doubt especially about the matrix damage criteria
if the thickness of your composite is small say less than 1.5 mm then the criteria will give meaning full results
Hi Sanan , I've encountered this error "When a sensor is defined only one output variable can be used for a particular output request since sensor names have to be unique. Please verify input." Do you know why?
Amirul Zolkhairi you might have checked the sensor
Hi Sanan, Thanks for this useful tut. I was wondering how you defined the material properties i.e "COMPOSITE"?
please check some other videos of mine and you will get it.
@@SanaanKhan Could you give the link to a specific video that shows the properties?
Hi Sanan,
Thank your for your wonderful videos. Could you please cite the papers you are referring to? I mean the Duran et al. if I'm not mistaken and the one you are referring for longitudinal shear stress.
Thanks again.
+parham S it is soden et al.
Thanks man.
+Sanan H Khan Thanks man.
Sir can you put a video for Quasi static indentation using honeycomb core and top and bottom composite facesheets please
Hi Sanan, I am doing a research on impact simulation of kevlar fabric composites. Do you think that the built-in Hashin damage model criteria can be used for plain weave fabric reinforced composites. I have some doubt especially about the matrix damage criteria. Is there any other damage model available for plain weave fabric reinforced composites?
Nooruddin Sadruddin No it's for UD. for plane weave use max stress or Tsai Wu envelopes. for mode wise failure yen and caiazzo criteria is there. some uses Hashin also but didn't explain the reason. though abaqus has inbuilt vumat subroutine for it and can be used.
Thanks Sanan for clearing up my doubts. I have tried using the inbuilt VUMAT. I read here ( www.researchgate.net/file.PostFileLoader.html?id=53823bc1d2fd644c4f8b46ec&assetKey=AS%3A273538722795522%401442228121981 ) that it can be employed by naming the material abq_ply_fabric but its not working. Have you ever tried using this VUMAT. And if so, can u please share how.
Again thanks for replying to my question.
Thanks a lot for sharing such a rare advanced simulation case. Could you please provide the link to your previous video? Or could you please provide just the material paramters that you defined as "Composite", especially damage evolution and damage stabilization?
(P.S. You should make the video self-contained. Trying to refer the audience to the previous video without specifiying which one or giving the link makes this tutorial less interesting.)
taken
please give the mentioned previous video you link
Hi! i became the error about the Orientation. It is: The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 4800 instance KOMPO_-45-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data.
What should i do? Thanks a lot.
Maybe someone faced my problem which I could solve it. I used data for amplitude in Load section and I finished everything but when I wanted to submit my job I faced the following error:
"The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 1 instance COMP-0-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data."
After searching, I used "assign stack direction" command in mesh section for each layer (before using this command you should click on "part" command on top of mesh section in object command and don't use assembly command ). after clicking on "assign stack direction" choose a part of a layer (for example we had 4 parts for each layer in this tutorial video) then click on the top surface of that part that is brown or near brown surfaces and do this step for each part of layer.
Hi Sanan,
Here your modelling only one forth (1/4th) of the domain because of symmetry. But while assigning the inertia properties to the tup you entered half (1/2) of the original mass.
To my understand we have to assign one forth (1/4) of the original mass of the tup. please correct me if i am wrong.
my total mass is 3.132. so 1/4 will be 0.783. that is what I have used.
oh sorry Sanan, its my mistake.
Thank you.
hi there .many thank for this video ,please could yo tell me what kind of bonding between layer are used regard
+ahmed alqayssi bonded with epoxy ly556 and 10% hardner.
+Sanan thank you Sinan
Hello sir
Can u please provide me with the spreadsheet that you used as an input for velocity profile . I am facing problems of distortion when i entered the instantaneous velocity
thanks in advance
+Preeti Joddabge looking for the same here
+Ricardo Tellez You people can use initial velocity instead.
hi . Sanan .. i had this error and couldn't fix it ..please help
"1 nodes have dof on which velocity/displacement/acceleration/base motion etc. constraints are specified simultaneously. The nodes have been identified in node set ErrNodeBCRedundantDof."
daoud yahia uncheck v3
sir, can you please make video on impact of drop weight on steel reinforced concrete slab
hi, thank you so much for the video, would you mind please send me the paper mentioned in this video?
Standard Test Method for Measuring the Damage Resistance of a Fiber-Reinforced Polymer Matrix Composite to a Drop-Weight Impact Event
go ahead with the link www.astm.org/Standards/D7136.htm
at 19.54 "edit individual contact property assignment" the properties in 3rd column how these were created in previous videos? can any body help please
hey did you figured out how those contact properties created?
Respected sir,
I tried to do the same but i am getting an error as "1 nodes have dof on which velocity/displacement/acceleration/base motion etc. constraints are specified simultaneously. The nodes have been identified in node set ErrNodeBCRedundantDof.'
I would be glad if u could kindly help me in solving it.
please bring the projectile under rigid conditions. curtail its movement in every direction other than z from load module.
Hi Sanan. I have performed impact analysis using both solid elements and Continuum shell elements. In your opinion, besides the computational time, which technique is preferable considering through thickness stresses and 3D stresses.
Manzar Masud hello manzar. i have tried using solid element for this problem. always get the error 'element missing property definition'. i also read somewhere that hashin damage can only be used with shell element. can u guide me how u used solid elements
Yes. u are right. Hashin can only be used with shell elements. If you want to use hashin with solid elements, u have to write your own user defined subroutine. Hashin will not work with solid elements.
Manzar Masud thanks. saved me a lot of literature review. did u find any difference in the outcome after using solid elements.
let me come in. i happen to miss the comments :). for out of plane problem like impact shell elements are not sufficient. they does not have sigma33 tensorial component which is the most dominating in that case. so the difference will be obvious. make your own subroutine. it will be a new learning process. if i got time i will try posing a video on it.
Sanan H Khan A video about writting Vumat would be grt help indeed. also have u done any composite impact problems in lsdyna or autodyn. Do the built-in material models in these solvers support solid elements with hashin or other composite damage models?
Hi Sanan
I am using instantaneous velocity for the tup. As you mentioned i am using a Step 1 to assign a positive velocity and created one more step viz. Step 2 to assign negative velocity. In both the steps i am assigning velocity same Reference point.
After submitting the job the following error is coming.
1 nodes have dof on which velocity/displacement/acceleration/base motion etc. constraints are specified simultaneously. The nodes have been identified in node set ErrnodeBCRedundant Dof.
Please help me to avoid this error.
Deactivate the first Displacement on Step-2
did it work?
GOOD
hi sanan. Thanks for the video. Well i have two questions.
i. As i do not have the amplitude data , so i have applied the initial velocity as 2.51 m/s. I can not apply the +2.51 m/s and -2.51 m/s on the same step. So please tell me what should i do? As with only 2.51 m/s, my impactor is going in the one side only and not coming back.
ii. My V3 vs time plot is constant at 2.51 m/s and U3 is also showing a straight line slope which is not correct. RF3 is showing good response.
If you can comment on above mentioned, I shall be grateful.
Manzar Masud go through the whole video. and you will find that it can be done by adding an additional step in the step module.
Manzar Masud moreover, the velocity will remain constant. it is your b.c. so it will. remember that the output is on the r.p. as per the video so it will strictly follow the impactor.
Thanks for your reply. Yes, i have found it and now trying the additional step method. Thanks.
did it work?
Dear Sir, For GRP We have to choose continuum shell or deformable solid while modelling?
Continuum Shell
@@SanaanKhan Thank you so much sir. One more silly doubt i got in the value of element relative thickness, i used the thickness of ply. is it correct?
yes, if only one element along the thickness. if two it should be thickness/2
Hi Sanan. How many hours did the job take to complete its run ?
I M STRUGGLING WITH SAME HOW MANY HOURS IT WILL TAKE TO COMPLETE THE RUN ACTUALLY I M WORKING ON SANDWICH COMPOSITE SO IS THERE NEED TO PROVIDE CONSTRAINT BETWEN SANDWICH LAYERS,,,,,,,......................
it depends upon your mesh and no of elements. check the stable time increment in the status file. if it is below 1e-8 try mass scaling the 'bad' elements. for this video, job took 20 hours to complete with intel i7 2.93Gzh with parallel processing.
thanks a lot sir.......... also sir i want to know is the velocity or mass make significant effect in analysis and how can be get the energy to bending, shear and indentation effect in this analysis. also here the impactor is not coming in the rest that means the energy of the impactor is always constant, this will not convert in to shear, bending or indentation energy..................
Dear sanan
It is mentioned in this video that contact property for L2L-0/0 , L2L-0/90, L2L-90/90 were different. But reference for contact properties were given as previous video, in that video only M2L and L2L properties are given. For different laminate layers L2L properties were used. (th-cam.com/video/o35aO8mONOU/w-d-xo.html)
what will be the difference if orientation changes ?
Thank you
regards
Lal Krishna G
Hello sir,
Thank you for the video. It was really helpful. I'm trying to model the impact of a spear into soil. Every time, the job aborts due to excessive deformation. Can you please give some idea on how to avoid it.
check the soil props. mesh finer. if spear has pointed nose. mesh the region below it even finer. use penalty contact. apply stabilization. in the status file check which element is failing. does it fail by distortion or rotation. try more resent version.
Thank you for the reply sir, I fixed the problem.
How did you create impact property?
@@sasikiranreddyk452 how you fixed
I am stuck at 19.03, when i click OK,
it states: The interaction property must be set for contact interactions.
Click MB3 over the table and select Create Property.
can someone help me out here. thanks
you have not created the interaction property. Create that first from the property module.
can you show me on how to create interaction property? It would be helpful. Thank you.
+Seridheren Yegarajoo see my previous video.
+Seridheren Yegarajoo see my previous video.
Hi there, I am modelling a composite as shown in the video for a coupled thermal electric problem. i have modeled it, assembled it and meshed it as shown in the video But during the analysis i get the error "elements have missing property definitions". Can you kindly help me through this?
+Awin Salian either you have not applied the material properties or taken wrong elements in the mesh module.
+Awin Salian Change the element type to continuum shell
Can you make this PDF available
Sir, What is the difference between in-plane shear strength of lamina and longitudinal shear strength and also how to find transverse shear strength of lamina if i know rest of strength properties.Please attach if any files are to corresponding calculation
when you consider plane...shear on that will be in plane like plane 1-2..then shear tau12...and longitudinal means in the fiber direction..i.e if fiber is in1 direction then 12...if fiber in 2 then 23...transverse shear strength tau23 is approx 0.3 times compressive strength of matrix considering 1 as fiber direction.
Hello Sanan, I have noticed you have several Sets, materials, Amplitudes already in the model before you start the tutorial. It would be very helpful if you could provide this information on an external link.
every tutorial is very long to go check another two or three one hour tutorial looking for the properties.
+Ricardo Tellez will going to take up the issue in the next video
Hi, how can i get the reaction force on the impactor? I've created the reference point on the impactor yet it give zero values?
output reaction force
I've tried that also, still got zero value. by the way, for the displacement constraint on the RF, should I put the value along U3 or just leave it zero?
Hello,
I have the same problem. Actually as an exercise I request RF1, RF2 and RF3.
I do get an output for RF1, and RF2, but not on the 3 direction.
Any suggestions how to overcome this? I am following the steps as stated in this tutorial.
+Ricardo Tellez if you are taking instantaneous velocity then try out putting A3 and after that using Newton 2 nd law get the rf3
sir,
i tried to model the same,but an error is coming like "4200 members missing property definitions"
how can i rectify that
Tony Rose you might not have assigned the property.
thanku sir.. i rectified that error..but still one problem is there,It is not showing the results,instead of that my tup is simply penetrating in to the composite layer. why it is so sir..?
Hello! I am trying to model Cold Gas Spray using Abaqus, is there any way you could help me with that? Im having some concerns regarding the interaction of elements.
If you could provide me with your email I would be more than happy to ask you a couple of questions.
Also, great video!
Hi Sanan, how to calculate delamination area for certain plies in abaqus?
please evolve the csdmg variable and use polynomial area method to do so.
@@SanaanKhan I have activated csdmg before this and then how to transform the shape of delamination to be plotted in graph and use polynomial area method..your help is appreciated.
@@mohdsuhairilmeon9362 take a pic and digitize the area by digimat. you can google it. its very simple.
@@SanaanKhan thanks a lot.. i will try it
Dear Sir, Can we model 2mm. Grp as a whole or we should model in layers?
if require delamination should model in layers
@@SanaanKhan Thank you so much sir. otherwise as a whole we can model right sir.
Dear sir, will u please tell the values of damage evolution and damage stabilization for this particular problem... i am need urgent ... pls help
damage evolution and stabilization values can be obtained from my previous videos.