If you input 110e6 and 150e6 in mat erosion, does that mean that if you do what you can, the element will be deleted? The basic feel of volume strain is to set it to 0.10 to delete elements when it exceeds 10%, right?
Thanks a lot sir.I have tried to develop a model for many day ago but I fail more time.Now,I done.Now I have tried to develop for composite and ceramic..
I’m having an issue, I’ve followed this exactly but the run time is 20 hours for me instead of 9 minutes…. My computer has 16GB of ram with i7-9750H 2.6GHz 6 code cpu so it makes no sense that it takes so much longer to run, especially when the code file says he’s only using one core to process
Thank you very much for this video. It was very helpful. I performed an impact analysis using the same procedure but after the analysis, the Animate result was only showing the impactor. The concrete wall only appears when the animation starts to run, then disappears almost immediately. Please can you guide me on how to solve this? Thank you.
This sort of problem is new to me, have you opened the d3plot file in the same window of the .k file? If so try opening it in a new window. Let me know what happened.
hi sir.... its a a llong back video, but i tried this simulation now only.... iam also facing the same issue as lazarusgyang, i aslo opened the d3plt in new window only but concrete wall disappeared at 2step itself.... could you please help for this problem@@bhargavgurrala27
@Mechanical assimilator Can you please tell me the why do we choose only the two values in the mat_erosion card i.e., maximum pressure and equivalent stress and how do we arrive at the values which we gave as input i.e., 110 MPa and 150 MPa?
1. The software has many keycards, when any card is used, we might observe many keywords which we do not have come across, but they might have been used by any Researcher in any of their project. If we do not exactly know the functionality of that keyword we keep them default that was set in the software and only change the values required. 2. Max pressure and equivalent stress failure. It depends on how you want the material to withstand the impact or when the failure has to happen.
What kind of material would I use for a steel target that erodes and a tungsten alloy projectile that is also eroding as it penetrates into the target material ? Could i use the "concrete material" that you used and just modify the variables or should i select a different material ? I would appreciate your feedback!
@Mechanical Assimilator I have modeled almost the same problem following the steps in this video, but I am not able to obtain the results as yours. The bullet's circular cap separates out from the bullet, it seems rather they are two different parts. Will you please let me know what seems to be wrong, I will share you the .k file, if you could share me your email ID?
After creating the profile, try merging the lines using the Curve tool (above Elements and mesh tool )under which you can see merge curve option and then create the mesh. Why can't you try creating a profile in solidworks, save it as an igs or step file and then import it into the .k file and automatically mesh it. I'm suggesting this because meshing part is predominantly performed in Hypermesh and Ansa and solving is done in LS-DYNA.
Try merging the lines then a spline gets created. Delete all the lines and then keep the meshed part and save it. Reopen the file again in a new window or in the same window. I tried and was able to perform the run. You will get it as well
If you input 110e6 and 150e6 in mat erosion, does that mean that if you do what you can, the element will be deleted? The basic feel of volume strain is to set it to 0.10 to delete elements when it exceeds 10%, right?
Thanks a lot sir.I have tried to develop a model for many day ago but I fail more time.Now,I done.Now I have tried to develop for composite and ceramic..
I'm glad it helped you
I’m having an issue, I’ve followed this exactly but the run time is 20 hours for me instead of 9 minutes…. My computer has 16GB of ram with i7-9750H 2.6GHz 6 code cpu so it makes no sense that it takes so much longer to run, especially when the code file says he’s only using one core to process
Thank you very much for this video. It was very helpful. I performed an impact analysis using the same procedure but after the analysis, the Animate result was only showing the impactor. The concrete wall only appears when the animation starts to run, then disappears almost immediately. Please can you guide me on how to solve this? Thank you.
This sort of problem is new to me, have you opened the d3plot file in the same window of the .k file? If so try opening it in a new window. Let me know what happened.
hi sir.... its a a llong back video, but i tried this simulation now only.... iam also facing the same issue as lazarusgyang, i aslo opened the d3plt in new window only but concrete wall disappeared at 2step itself.... could you please help for this problem@@bhargavgurrala27
@Mechanical assimilator Can you please tell me the why do we choose only the two values in the mat_erosion card i.e., maximum pressure and equivalent stress and how do we arrive at the values which we gave as input i.e., 110 MPa and 150 MPa?
1. The software has many keycards, when any card is used, we might observe many keywords which we do not have come across, but they might have been used by any Researcher in any of their project. If we do not exactly know the functionality of that keyword we keep them default that was set in the software and only change the values required.
2. Max pressure and equivalent stress failure. It depends on how you want the material to withstand the impact or when the failure has to happen.
Is it possible to create geometry of the bullet in LS-DYNA itself? If so, could you please explain how to do it!
Hi Yash, Yes, the geometry and the mesh can be done using the 2d mesher and other options in LSPP
What kind of material would I use for a steel target that erodes and a tungsten alloy projectile that is also eroding as it penetrates into the target material ? Could i use the "concrete material" that you used and just modify the variables or should i select a different material ? I would appreciate your feedback!
I think you should look up Johnson-Cook material cards for that.Also for eroding effects you should look up eroding contacts.
Please share that bullet files in google link.. So that we can learn more easily..btw Good video
Hi Ajinkya, It's a 35mm bullet case with 12.7 dia. Very easy to design and meshing is also explained in the video
@@bhargavgurrala27 .. That's great. But can you make one video on bullet impact on composite laminate with the help of hyperworks Or LSdyna?..
@@ajinkyamane9091 . I'll work on it. Thank you for the suggestion
Hi can u help me to do simulation of gypsum board subject to impact loading?
@Mechanical Assimilator I have modeled almost the same problem following the steps in this video, but I am not able to obtain the results as yours. The bullet's circular cap separates out from the bullet, it seems rather they are two different parts. Will you please let me know what seems to be wrong, I will share you the .k file, if you could share me your email ID?
After creating the profile, try merging the lines using the Curve tool (above Elements and mesh tool )under which you can see merge curve option and then create the mesh. Why can't you try creating a profile in solidworks, save it as an igs or step file and then import it into the .k file and automatically mesh it. I'm suggesting this because meshing part is predominantly performed in Hypermesh and Ansa and solving is done in LS-DYNA.
Try merging the lines then a spline gets created. Delete all the lines and then keep the meshed part and save it. Reopen the file again in a new window or in the same window. I tried and was able to perform the run. You will get it as well
Thanks! for this tutorial. can you help in tall truck collision on steel bridge; please send reply your email address
mechanicalassimilator@gmail.com
yadda.icm.edu.pl/baztech/element/bwmeta1.element.baztech-4eef9656-2617-48ec-b9db-acb3539836be/c/Panowicz.pdf