Learning Forum

[turgut.ataseven]

Hi,

I am trying to analyze shear pin breaking analysis in LS-DYNA Workbench. After 1 hour of running, run progressed to only 1e-6 seconds of 0.25 seconds of total time. Used material has Multilinear Isotropic Hardening and Plastic Strain Failure properties assigned. 56.5k elements are present in the mesh structure. There are no contacts. Force is applied to the surface of the pin. 4 cores are used. Hourglass control no 4 is selected. I can send the archived project file by the method you specify. What is the solution to this problem?

[Dennis Chen]

While there's certainly not enough information, I can sort of guess that this is due to stable time increment being too small, probably due to element distortions since you are trying to run some kind of failure behavior. 

My suggestion is to look at the basics, and start with something far smaller than 56k elements so you can learn what controls the time increments, perhaps starting with a coarse mesh since that will drastically speed up the problem.     Try different element type/formulations, consider using mat_add_erosion, etc.