blazzzzzz
Bioengineer
- May 2, 2007
- 7
Hi,
I am trying to model an intervertebral disc, in compression.
So for now it's just a rod with 2 thin endplates on both edges, one is fixed and one has a pressure load compressing everything.
I am heading towards making it more realistic in terms of geometry and ideally it will porohyperelastic.
But for now Im just getting familiar with ABAQUS and want to make it just hyperelastic. I am using Mooney Rivlin equations and putting the coefficients into ABAQUS. My question is, when I put elastic properties the job is completed, no problem. But when I put hyperelasticity, the job is aborted but gives results anyway (negative eigenvalues, and excessive distortion in the msg file). can I solve this? how much can I trust the data of these aborted jobs? I also noticed that if I put a lower pressure load, then the job is completed.
Can anyone help me? I hope I was clear enough.
Thank you very much
Ben
I am trying to model an intervertebral disc, in compression.
So for now it's just a rod with 2 thin endplates on both edges, one is fixed and one has a pressure load compressing everything.
I am heading towards making it more realistic in terms of geometry and ideally it will porohyperelastic.
But for now Im just getting familiar with ABAQUS and want to make it just hyperelastic. I am using Mooney Rivlin equations and putting the coefficients into ABAQUS. My question is, when I put elastic properties the job is completed, no problem. But when I put hyperelasticity, the job is aborted but gives results anyway (negative eigenvalues, and excessive distortion in the msg file). can I solve this? how much can I trust the data of these aborted jobs? I also noticed that if I put a lower pressure load, then the job is completed.
Can anyone help me? I hope I was clear enough.
Thank you very much
Ben