I’ve been performing some simulations with the peridynamics package. I’ve run into an issue I cannot solve by myself, and I hope you can help me.
I’m modeling the fracture of a “dog bone” sample. I made some initial tests using the standard PERI/LPS model, and I got some “good” results. Meaning, I put in realistic parameters, ended up with believable results for a series of parameters I am monitoring (applied forces/stresses, energies, fracture patterns, etc).
I then wanted to test the elasto-plastic model (EPS), which (I understand) should work in the same way as the LPS model. I modified my simulation script adding in the required yield stress, but my samples keeps on blowing up in a thousand pieces as soon as any tiny amount of stress is applied to it.
I couldn’t find any example script for the EPS model, so I wonder if I’m doing something wrong.
This is the (working) code for the LPS:
pair_coeff * * 2.4e9 1.0e9 0.0015001 0.0005 0.25
while this is (non working) what I was using for the EPS:
pair_coeff * * 2.4e9 1.0e9 0.0015001 0.0005 0.25 15.0e6
By the way, I am aware that there was an issue with the kernel stack in the eps code (fixed by Axel Kohlmeyer some weeks ago), but I don’t think that’s related. I had that issue too, and the patch fixed it for me.
Thank you very much,