Hi Dr. Wagner, Thank you for detail explanation. I see you have been using compression damage data including damage. Whereas for tension, only Concrete Tension Stiffening data has been used. 1. May I ask, why you haven't used tension damage data similarly as compression, such as inelastic or plastic strain, tension damage? 2. What is the meaning of the value *Concrete Tension Stiffening - 2.842, 0? 3. What is the reason for highlighting your data with red colour (at 6.47 min)? Thank you.
1. Easy answer, I forgot :) to use tension data 2. Its "yield stress" equivalent and plastic strain zero 3. The red data was a reminder for me that the data points are extrapolated from the other data
Thank you very much for your video. I am learning this part of the content. I don't know if I can share the CDP parameter table in the video. Thank you very much.
Hi .. Great Video! I was wondering how did you plot the Force Displacement curve? I don't think you will be able to extract force data from a couple reference point. Can you please tell me how were you able to plot the force-displacement cuver? Thanks Again!
@@hnrwagner thanks! But I was wondering if one point would actually be close to the real life testing. Generally the force transducer is at the top and accounts for the overall area of the applied load. Would love to hear your opinion. Thanks!
@@SamFred93 i think for a real approximation of the loading , both points are required to be evaluated. I have done ît a few times for 4pb of composite frames and there we use the sum of the reation forces from both reference points and it was very close to the test result. i am not sure about the procedure on concrete though.
Hi, I used to model CDP to simulate bending test and compare with the experiment. The result has smaller flexural strength 2 times than experiment (for tension test it's worked well). Do you think CDP model is good enough for bending test ?
Finally, for the force you meant reaction force right? Since as far as I understand the force is gradually increasing I did not get it since you used displacement. Also, when should we use dynamic explicit? Here, we could not use static general? P.S. Regarding boundary conditions you used -10 mm for u2 and amplitude which means that for example we have 0.01*10 mm at 0.01 second and 0.02*100 mm at 0.02 second and etc. right?
element deletion works only in dynamic explicit. not in static general. The scale of the displacement should (according to my understanding be) at time 0.01 - displacement 0.01*10 mm at time 0.02 - displacement 0.02*10 mm and so on
@@hnrwagner sir, what will be the loading rate in force control method.? The value to be provided in input of load magnitude and time in tabular form.?
Hello Sir, I want to test a pure concrete wall panel using ABAQUS, no lab experiments allowed due to COVID, how can I derive the CDP values of concrete and if I use that to model under specific load cases, would I be able to see whether my panel has failed or not? If so, how? Please help me in this regards.
@@hnrwagner I actually don't have that too, using Eurocode I got compressive stress-strain but I don't have idea about tension. I am Undergrad and not an expert. I know the concrete grade anyway.
Sir, I have an idea to collaborate. It is regarding the failure criteria for specific composite plates and different geometries. Are you available for collaboration?
Guten Tag Herr Wagner, vielen Dank für das Tutorial. Die Daten für die concrete damaged plasticity: Wo bekommt man die her? Sind das Versuchswerte von erfolgten Versuchen? Gibt es hierfür Literatur? Ich bräuchte die Daten für einen C30/37 Beton und weiß nicht wo ich die herbekommen kann. Vielleicht könnten Sie mir helfen. Vielen Dank!
Die Versuchsdaten gibt es von einem Zug und Drucktest oder aus Wissenschaftlichen Artikeln, die Damage Parameter usw. rechnet man anhand der Spanungs-Dehnungs Kurve aus: th-cam.com/video/3qSNKIBdPqY/w-d-xo.html
Also, the imperfection you did it later right? It was not in the initial model I think? You did the same procedure but with imperfection, right? So, when we want to simulate experiment in abaqus how can we recognize the defects? I mean if they are in micro scales we might neglect it (If we want to simulate macro-scale). If they are visible then how can we measure imperfections?
the imperfection was added because I thought it would lead to a similar failure mode as in the test. I think the imperfections are important for crack propagation, dont know for sure though. I worked most of the time with thin-walled shell were material failure is not relevant. Imperfections are usally measured with optical measurement systems like ARAMIS (at least for shells)
I have followed everystep but at the end when I am submitting the job it says the increment is more than 20,000,000 and forced me to use double precision?
@@hnrwagner Thank you for your reply. I am currently on maternity leave from my research at QUT in Australia. I would like to have your email id for further communication. Thank you.
@@hnrwagner I was able to achieve the result for rough mesh. But as soon as I redfined the mesh size the beam didn't even break. Any idea on what could have gone wrong?
@@choiquincy4598 I think so, btw, here is an updated video for a similar problem using pyhton, this may help you: th-cam.com/video/Ri_MvB3WhWM/w-d-xo.html
with the additional support on the right (in my mind) I prevent rigid body motions. Also, I am not used to using element deletion, I think it looks nice, but I don’t know how close to reality it really is.
thankyou very much sir... i was in deep trouble ...was finding difficult to learn this software for my thesis work as there were no proper expertise .... please can u make videos on prestressed concrete corrosion..... particularly pretensiong method
Thank you very much for this video! Your videos have been very useful to me. Would you consider making one using a thermal dynamic explicit step? I'm trying to model that, but I don't know what I'm doing wrong. Thanks a lot!
Thank you for answer, I have a question about concrete beam with reinforcing bars,can you explain ,how to present parameters ottosen damage model for the concrete, greetings
![[MV] A leap of faith...ความเชื่อใจครั้งสุดท้าย (From "Petrichor the series")](http://i.ytimg.com/vi/U1piZH2CNXA/mqdefault.jpg)
Hi Dr. Wagner,
Thank you for detail explanation. I see you have been using compression damage data including damage. Whereas for tension, only Concrete Tension Stiffening data has been used.
1. May I ask, why you haven't used tension damage data similarly as compression, such as inelastic or plastic strain, tension damage?
2. What is the meaning of the value *Concrete Tension Stiffening - 2.842, 0?
3. What is the reason for highlighting your data with red colour (at 6.47 min)?
Thank you.
1. Easy answer, I forgot :) to use tension data
2. Its "yield stress" equivalent and plastic strain zero
3. The red data was a reminder for me that the data points are extrapolated from the other data
@@hnrwagner Thank you so much.
Thank you very much for your video. I am learning this part of the content. I don't know if I can share the CDP parameter table in the video. Thank you very much.
Hi, clear video. Could you please explain how to get multiple viewports with different views like the one in the video? Thank you in advance
a example is shown here:
th-cam.com/video/E5Q7izKTkp8/w-d-xo.html
from 10:00
Sir, can you put a detailed video on how to extract load-deflection data of a 3D RCC beam from Abaqus?
Hi .. Great Video! I was wondering how did you plot the Force Displacement curve? I don't think you will be able to extract force data from a couple reference point. Can you please tell me how were you able to plot the force-displacement cuver?
Thanks Again!
I extracted the load displacement curve from on of the reference points :)
@@hnrwagner thanks! But I was wondering if one point would actually be close to the real life testing. Generally the force transducer is at the top and accounts for the overall area of the applied load. Would love to hear your opinion.
Thanks!
@@SamFred93 i think for a real approximation of the loading , both points are required to be evaluated. I have done ît a few times for 4pb of composite frames and there we use the sum of the reation forces from both reference points and it was very close to the test result. i am not sure about the procedure on concrete though.
Great job 👌
Dear Dr. Wagner, I wanted to include rate dependence while simulating concrete damage plasticity model. How can we do that?
Hello Sir. Thank you for your videos. I'd like to ask you: how could I get the vertical force - vertical displacement curve of beam mid span section?
a similar example is shown here:
th-cam.com/video/E5Q7izKTkp8/w-d-xo.html
from 10:00
@@hnrwagner Thank you, really appreciate your help!
Hi, I used to model CDP to simulate bending test and compare with the experiment. The result has smaller flexural strength 2 times than experiment (for tension test it's worked well). Do you think CDP model is good enough for bending test ?
Hi can you please help me doing repeated impact test on concrete beam
Finally, for the force you meant reaction force right? Since as far as I understand the force is gradually increasing I did not get it since you used displacement. Also, when should we use dynamic explicit? Here, we could not use static general?
P.S. Regarding boundary conditions you used -10 mm for u2 and amplitude which means that for example we have 0.01*10 mm at 0.01 second and 0.02*100 mm at 0.02 second and etc. right?
element deletion works only in dynamic explicit. not in static general.
The scale of the displacement should (according to my understanding be)
at time 0.01 - displacement 0.01*10 mm
at time 0.02 - displacement 0.02*10 mm
and so on
@@hnrwagner sir, what will be the loading rate in force control method.? The value to be provided in input of load magnitude and time in tabular form.?
Hello Sir,
I want to test a pure concrete wall panel using ABAQUS, no lab experiments allowed due to COVID, how can I derive the CDP values of concrete and if I use that to model under specific load cases, would I be able to see whether my panel has failed or not? If so, how? Please help me in this regards.
You only need the stress strain curves under compression and tension for the cdp value.
@@hnrwagner I actually don't have that too, using Eurocode I got compressive stress-strain but I don't have idea about tension. I am Undergrad and not an expert. I know the concrete grade anyway.
material data:
github.com/hnrwagner/Concrete-ABAQUS-input-data
Is there a way to determine damage parameters?
it is shown here:
th-cam.com/video/3qSNKIBdPqY/w-d-xo.html
Sir, I have an idea to collaborate. It is regarding the failure criteria for specific composite plates and different geometries. Are you available for collaboration?
Sir, if no you can easily say no that I would look for another collaborate:)
Dear Torkan, thanks for the offer but i only like to work in projects which cover shell buckling :)
@@hnrwagner No problem sir sure:)
Guten Tag Herr Wagner, vielen Dank für das Tutorial. Die Daten für die concrete damaged plasticity: Wo bekommt man die her? Sind das Versuchswerte von erfolgten Versuchen? Gibt es hierfür Literatur? Ich bräuchte die Daten für einen C30/37 Beton und weiß nicht wo ich die herbekommen kann. Vielleicht könnten Sie mir helfen. Vielen Dank!
Die Versuchsdaten gibt es von einem Zug und Drucktest oder aus Wissenschaftlichen Artikeln, die Damage Parameter usw. rechnet man anhand der Spanungs-Dehnungs Kurve aus:
th-cam.com/video/3qSNKIBdPqY/w-d-xo.html
I face error in Arranging independent variable in ascending order plz help me
I had this error also, your data is wrong, check it is ascending and the descending, it only should be ascending
@@hnrwagner In which place data is placed in ascending order or descending order plzz help
@@Civil707damage Parameter and strain for concrete
@@Civil707 in material properties the strain and damage parameters
Hi sir, how to make the CDP? Thank you so much.
th-cam.com/video/3qSNKIBdPqY/w-d-xo.html
@@hnrwagner Thank you so much, sir. But how to have Stress-Strain? I use Kent-Park Model but my results are not correct compared to the experiment
please share excell sheet for ampltiude and DP, thanks
you mean the column of data from 4:20 ? and what is DP?
@@hnrwagner excell sheet for define of concrete material
and why you used amplitude with explicit?
@@amrmasoud5580
github.com/hnrwagner/Concrete-ABAQUS-input-data
@@amrmasoud5580 for non-zero displacement you have to define a table of values, at least this was my error message
Hi. Please can you share the excel and cae file ?
Also, the imperfection you did it later right? It was not in the initial model I think? You did the same procedure but with imperfection, right? So, when we want to simulate experiment in abaqus how can we recognize the defects? I mean if they are in micro scales we might neglect it (If we want to simulate macro-scale). If they are visible then how can we measure imperfections?
the imperfection was added because I thought it would lead to a similar failure mode as in the test. I think the imperfections are important for crack propagation, dont know for sure though. I worked most of the time with thin-walled shell were material failure is not relevant.
Imperfections are usally measured with optical measurement systems like ARAMIS (at least for shells)
@@hnrwagner We used DIC before to do that actually with aramis-gom
@@hnrwagner I mean if we want to model the same imperfection how can we know the size?
@@Pishgul
i think the width and depth was like 10 mm, but as i said, i am not sure if the influence is that big.
07:53 what is the keyword *concrete failure in Abaqus 2017 because there is an error "Unknown keyword "concretefailure"."
I want to ask the link of the old video
@@郭芠圻-q4y this keyword works only in abaqus 2019 and above, you cannot have element deletion in your abaqus version with concrete damage plasticity
@@hnrwagner I see.Thank you for replying!
I have followed everystep but at the end when I am submitting the job it says the increment is more than 20,000,000 and forced me to use double precision?
that is not that bad or is it? it will take awhile
@@hnrwagner I have managed to do it however it breaks into 3 parts instead of the middle. Do you know what might be the problem?
@@choikwanching3846 cant say depends on many variables
@@hnrwagner would you be able to provide any sort of guidance at all?
Could you please help me to model concrete filled GFRP tube in 4 point bending?
i am currently on a business trip and can't access my abaqus
@@hnrwagner Thank you for your reply. I am currently on maternity leave from my research at QUT in Australia. I would like to have your email id for further communication. Thank you.
Hello Sir. In order to achieve the result for the finer mesh. Is there any settings you need to change or other than mesh size?
I only changed mesh size
@@hnrwagner I was able to achieve the result for rough mesh. But as soon as I redfined the mesh size the beam didn't even break. Any idea on what could have gone wrong?
or do I need to do the coupling and rp as well?
@@choiquincy4598 I think so, btw, here is an updated video for a similar problem using pyhton, this may help you:
th-cam.com/video/Ri_MvB3WhWM/w-d-xo.html
@@hnrwagner will it be possible by any chance we can have a meeting?
Sir, what is the role of element deletion? Also, why you make u2=u3=0 for the right hand side but just u2=0 simply supported for the left hand side?
with the additional support on the right (in my mind) I prevent rigid body motions.
Also, I am not used to using element deletion, I think it looks nice, but I don’t know how close to reality it really is.
Timecodes:
0:00 - Intro
0:45 - Create Solid - Part
1:32 - Create Partitions
3:05 - Step definition
3:16 - Boundary Conditions and Loading
4:55 - Mesh
5:37 - Material definition
9:11 - Modify step output
10:19 - Results - Part 1 (rough mesh)
11:12 - Results - Part 2 (fine mesh)
13:30 - Reference Point Definition
thankyou very much sir... i was in deep trouble ...was finding difficult to learn this software for my thesis work as there were no proper expertise .... please can u make videos on prestressed concrete corrosion..... particularly pretensiong method
Thank you very much for this video! Your videos have been very useful to me. Would you consider making one using a thermal dynamic explicit step? I'm trying to model that, but I don't know what I'm doing wrong. Thanks a lot!
Thank you for the video.Please, can I give your email?
ask the question here, I dont answer emails
Thank you for answer, I have a question about concrete beam with reinforcing bars,can you explain ,how to present parameters ottosen damage model for the concrete, greetings
How to present parameters ottosen damage model in abaqus
@@harchouchezineelabidine7493 Do not know yet, I havent even heard of it until now. I may check if i take the time.
@@hnrwagner Well, thank you very much for your answer