kimokad
Bioengineer
- Aug 26, 2020
- 1
Hello,
Info on my structural simulation:
Solver: Static Implicit
Material Model: Multiple Materials with shared nodes, all Hyperelastic Isotropic and incompressible
Contact: none
Elements: C3D4H or C4D10H
Step: 1 step with load applied in a ramped fashion
Mesh: Meshed externally on Gmsh and imported as Orphan Mesh
Workstation: 28 cores, 32 GB ram, 60GB free on hard disk
My Issue: While conducting mesh convergence analysis I cut the element size and rerun to check for convergence of the stress, however I have reached the point where when using C3D4H elements my model passes 2.5 million elements at which point the next level of fineness is 3.6 million elements. This 3.6 million element mesh runs until 0.3s-0.8s at which point it exits with an error "Process terminated by external request (SIGTERM or SIGINT received). I also tried running mesh convergence with C3D10H elements, and the same problem occurs at 800k elements with quad tets (successful simulation up to 500k elements). This seems to be an issue once the model complexity reaches a certain limit (DOF for the failing simulations seem to be similar).
What I tried:
-I tried reducing the field output requests (only stress and displacement requested for last increment) and same problem still occurs.
-One weird thing that helps is reducing maximum increment size (0.05s increments gets me up to 0.8) but 0.02s does not help. Running on command line does not help.
-Reducing number of cores did not help.
-Another error that occasionally occurs is "The executable standard.exe aborted with system error code 1073740791."
-Googling about the problem only brings up a few threads where the issue is unresolved.
-I checked the power settings to make sure the workstation does not sleep after a set amount of time
-I tried cleaning up more disk space but going up to 60GB does not resolve the issue.
I thought that this exit message only occurs when I deliberately cancel the job, but this has consistently occurred when I leave the workstation alone
Any help with this issue would be appreciated.
Thanks!
Info on my structural simulation:
Solver: Static Implicit
Material Model: Multiple Materials with shared nodes, all Hyperelastic Isotropic and incompressible
Contact: none
Elements: C3D4H or C4D10H
Step: 1 step with load applied in a ramped fashion
Mesh: Meshed externally on Gmsh and imported as Orphan Mesh
Workstation: 28 cores, 32 GB ram, 60GB free on hard disk
My Issue: While conducting mesh convergence analysis I cut the element size and rerun to check for convergence of the stress, however I have reached the point where when using C3D4H elements my model passes 2.5 million elements at which point the next level of fineness is 3.6 million elements. This 3.6 million element mesh runs until 0.3s-0.8s at which point it exits with an error "Process terminated by external request (SIGTERM or SIGINT received). I also tried running mesh convergence with C3D10H elements, and the same problem occurs at 800k elements with quad tets (successful simulation up to 500k elements). This seems to be an issue once the model complexity reaches a certain limit (DOF for the failing simulations seem to be similar).
What I tried:
-I tried reducing the field output requests (only stress and displacement requested for last increment) and same problem still occurs.
-One weird thing that helps is reducing maximum increment size (0.05s increments gets me up to 0.8) but 0.02s does not help. Running on command line does not help.
-Reducing number of cores did not help.
-Another error that occasionally occurs is "The executable standard.exe aborted with system error code 1073740791."
-Googling about the problem only brings up a few threads where the issue is unresolved.
-I checked the power settings to make sure the workstation does not sleep after a set amount of time
-I tried cleaning up more disk space but going up to 60GB does not resolve the issue.
I thought that this exit message only occurs when I deliberately cancel the job, but this has consistently occurred when I leave the workstation alone
Any help with this issue would be appreciated.
Thanks!