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Cannot complete study on viscoelastic material compression

Cannot complete study on viscoelastic material compression

Cannot complete study on viscoelastic material compression

(OP)
Hi all, I'm trying to model the compression of a 0.1"x1.5"x1.5" pad which is made out of a viscoelastic material. I'm using the viscoelastic material model and have (i believe) created a correct material using relaxation data. The pad undergoes a simple compression of about 40 psi over the course of a minute. the problem is that about 1/3 of the way through running the study, the simulation crashes. I get the following error:
Solution failure in a Step>1, it could be due to: The solution may be at a buckling or limit point, i.e., displacements grow large under constant forces. Iterations not converging:  o Raise the convergence tolerance slightly(Last resort)

But there's very little displacement occurring - I might as well do a nonlinear study. Has anyone encountered this problem or know if I'm doing something wrong? I can't find anything on the web about convergence tolerance...

RE: Cannot complete study on viscoelastic material compression

If you are the same poster who posted a 7 or 8 value compression data elsewhere then I think you are still in the wrong forum, and you need to smooth the data out.

 

Cheers

Greg Locock


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