I am solving a 3D highly non linear metal forming problem in the COMSOL structural mechanics module. In which the plasticity with large deformation, contact with friction etc. are involved. I am often face the problems related to convergence error after a little change in the model ,like
"elasto-plastic strain variable did not converge in domain 2.", "Maximum number of dogleg iteration reached.'' etc.
Please suggest me some good resources/ video from where I can better understand the solver setting for non linear problem like which solver should be used, what setting should be done in advanced, parametric etc?
Thanks for help!
Shyam
Hello
There are some videos about nonlinear solvers on the Comsol site and also you can search on youtube about this problem.
Best
Reza
hi
generally, solutions divergence in COMSOL can be attributed to the inappropriate mesh size, initial values, boundary conditions, and initial conditions. change their values then compute. as a personal experience changing the initial values is super helpful.
Thanks Reza and Pouria. I am learning all these things actually on Youtube or on site very few video is available for solid mechanics related problem as compare to other physics domain.
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