Models can be donwloaded free from www.professor3mec.com Please do support the channel at ko-fi.com/professor3mec All proceedings go towards new videos and keeping the webpage going.
@@Professor3MEC Sir can you please help me out? I have copied what you have done but With the displacement and rigid body constraint i'm confused on how to add the indenter load...
Thank you for the tutorial; it's very helpful. I want to modify the fall cone test, which is somewhat similar to the nanoindentation test. However, in this test, the cone penetrates the sample solely under its own weight without any additional applied load. The problem with my simulation arises when the angle of the cone is reduced (e.g., 15 degrees as half of 30). In these cases, the cone does not make contact with the sample and seems to penetrate without resistance. Conversely, with a larger angle (like 45 degrees), this problem does not occur. Can you guide me on how to solve this issue? I would be grateful if you could provide a way to contact you, so I could show you figures for a clearer understanding of what I am talking about. Thank you very much in advance
Professor 3MEC 0 seconds ago Instead of displacement boundary condition you may apply an equivalent force or equivalent force. Or you can use displacement boundary condition and track the forces as shown in the below video. th-cam.com/video/vO-KtD-R2U8/w-d-xo.html
I found this video very useful. Thank you for uploading it. I have to simulate nanoindentation experiment, I am trying to match laod displacement curve of simulation and that of experiment, but in vain. How can I find tangent modulus and yield strength of my film? I have elastic modulus (160GPa) and hardness (7Gpa)? 16:08
Thanks for pointing this out, yes you are right. Since its a static general step so might not have much effect. But in principle it should have 8.5∙10-9 tonne/mm3
Here is an example: MASS LENGTH TIME FORCE STRESS ENERGY DENSITY YOUNG's 35MPH 56.33KMPH GRAVITY ton mm s N MPa N-mm 7.83e-09 2.07e+05 1.56e+04 9.806e+03
What would happen if you increased the young's modulus of this material? If someone were to implement a metals (E) for example Copper (E) of 125,000 MPa would you need to run it in explicit?
for the amplitude function, if we wanted to set a hold time (hold time for indenter), how can we do it? I am trying to run the same simulation with amplitude (0,0) (0.5,1) (1,1) (1.5,0) but I find it doesnt work like this
If hold time is to keep displacement constant then above should work. If hold time is to keep force constant then it should be a force driven test and force should be applied with amplitude function.
first of all, thank you for the nice work. question: I have a material property and its experimental data but as I use this method, with the same experiment displacement amount, the load is much bigger. Is there a way to define maximum load with different strain rates to reach experimental curvature?
Also I don't understand the reason behind setting modulus of elasticity 1100MPa (1.1 GPa), which for Brass is around 100 GPa. why did you choose such an small value for that? and how do you calibrate data with just altering modulus of elasticity? your answer is appreciated Professor.
I just used values for demonstration which were provided by the subscriber. To fit load displacement data you may have to play with properties to get a better fit.
Hello Sir, I want to do the appearance test for a 380 micrometer substrate layer, but I do not know the geometry of the indenter Berkovich, please I need your help
Thanks for liking. Regarding your question, it will depend on what you really want to do. As per ASME VIII you can do standard and run it until element localises, i.e. simulation will not converge and that will give you a value. If you want to do with damage and element deletion criteria then again it should be fine depending on the problem with no inertia, etc.
Sure If you could send me problem description with relevant details of the model. Please don’t send me a research paper just a short problem description with geometry. Boundary and loading conditions. Material properties, etc.
![[LIVE] : ONE ลุมพินี 76 | คู่เอก "ผึ้งหลวง vs สมิงดำ"](http://i.ytimg.com/vi/9SBshmGQOIM/mqdefault.jpg)
Models can be donwloaded free from www.professor3mec.com
Please do support the channel at ko-fi.com/professor3mec
All proceedings go towards new videos and keeping the webpage going.
Thank you very much for this comprehensive tutorial on the Berkovich simulation (indentation test)
Thanks for liking the video and glad you find it useful.
Thank you sir, I am working on my final year project and this video could not have been uploaded at a better time! Wish you good health sir.
Many thanks for liking and glad that you find it useful. All the best.
@@Professor3MEC Sir can you please help me out? I have copied what you have done but With the displacement and rigid body constraint i'm confused on how to add the indenter load...
sure
@@Professor3MEC Not a problem Sir, I have completed my final report! Thank you for your video for help
bro we are doing the same final year project and we are stuck at how to proceed can u please help me out.
thankyou .
Thank you for the tutorial; it's very helpful. I want to modify the fall cone test, which is somewhat similar to the nanoindentation test. However, in this test, the cone penetrates the sample solely under its own weight without any additional applied load.
The problem with my simulation arises when the angle of the cone is reduced (e.g., 15 degrees as half of 30). In these cases, the cone does not make contact with the sample and seems to penetrate without resistance. Conversely, with a larger angle (like 45 degrees), this problem does not occur.
Can you guide me on how to solve this issue? I would be grateful if you could provide a way to contact you, so I could show you figures for a clearer understanding of what I am talking about. Thank you very much in advance
you can contact me through www.professor3mec.com.
Please, can you explain how to input the load value in the indenter?
Professor 3MEC
0 seconds ago
Instead of displacement boundary condition you may apply an equivalent force or equivalent force. Or you can use displacement boundary condition and track the forces as shown in the below video.
th-cam.com/video/vO-KtD-R2U8/w-d-xo.html
@@Professor3MEC Thank you, Prof. That means I need to keep varying the displacement until I have the same force used in my experiment.
@@Professor3MEC That means I must keep varying the displacement until I have the same force value in my experiment.
I found this video very useful. Thank you for uploading it. I have to simulate nanoindentation experiment, I am trying to match laod displacement curve of simulation and that of experiment, but in vain. How can I find tangent modulus and yield strength of my film? I have elastic modulus (160GPa) and hardness (7Gpa)? 16:08
Glad you find it helpful. I have another video on that if you could please have a look on the channel?
Hi thanks for the video. since the unit here is mm, should the density be t/mm3?
Thanks for pointing this out, yes you are right. Since its a static general step so might not have much effect. But in principle it should have 8.5∙10-9 tonne/mm3
Here is an example:
MASS LENGTH TIME FORCE STRESS ENERGY DENSITY YOUNG's 35MPH
56.33KMPH GRAVITY
ton mm s N MPa N-mm 7.83e-09 2.07e+05 1.56e+04 9.806e+03
@@Professor3MEC Thank you so much sir. Wish you good healthy.
What would happen if you increased the young's modulus of this material? If someone were to implement a metals (E) for example Copper (E) of 125,000 MPa would you need to run it in explicit?
Yes you can change material properties as appropriate and can use explicit If force controlled test which may get tricky for standard
for the amplitude function, if we wanted to set a hold time (hold time for indenter), how can we do it?
I am trying to run the same simulation with amplitude (0,0) (0.5,1) (1,1) (1.5,0) but I find it doesnt work like this
If hold time is to keep displacement constant then above should work.
If hold time is to keep force constant then it should be a force driven test and force should be applied with amplitude function.
first of all, thank you for the nice work.
question: I have a material property and its experimental data but as I use this method, with the same experiment displacement amount, the load is much bigger.
Is there a way to define maximum load with different strain rates to reach experimental curvature?
Also I don't understand the reason behind setting modulus of elasticity 1100MPa (1.1 GPa), which for Brass is around 100 GPa. why did you choose such an small value for that? and how do you calibrate data with just altering modulus of elasticity?
your answer is appreciated Professor.
I just used values for demonstration which were provided by the subscriber.
To fit load displacement data you may have to play with properties to get a better fit.
Hello Sir, I want to do the appearance test for a 380 micrometer substrate layer, but I do not know the geometry of the indenter Berkovich, please I need your help
Appearance test?
@@Professor3MEC nanoindentation test or a 380 micrometer substrate layer with a Berkovich indenter
Thank you Sir, to simulate a burst test of a tube modeled with axysimetric, is the standard approach okay?
Thanks for liking. Regarding your question, it will depend on what you really want to do. As per ASME VIII you can do standard and run it until element localises, i.e. simulation will not converge and that will give you a value. If you want to do with damage and element deletion criteria then again it should be fine depending on the problem with no inertia, etc.
@@Professor3MEC could you do a tutorial about it?
Sure If you could send me problem description with relevant details of the model. Please don’t send me a research paper just a short problem description with geometry. Boundary and loading conditions. Material properties, etc.