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Possible solutions on non-converging solution
Posted 2014年1月2日 GMT-5 04:03 Version 4.3b 0 Replies
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I'm doing a solid mechanics model. Basically what I want to achieve is by changing a material stiffness (parameters' values in an energy density function) over time, the material will contract. I first constructed the model at reference state (Ta=0), then I used parametric sweep to increase Ta until 1 (fully contracted) in stepping {range(0,0.05,1)}.
Firstly I used normal sized mesh, then the solution cannot converge at Ta=0.5. Then I used fine size, cannot converge at Ta=0.75. Then I used finer size, surprisingly it cannot converge at Ta only 0.2. Why is like that? I tried also to use a smaller stepping but it didn't help.
After that, I tried to used time-dependent solver and see (fine mesh). Still, the solution failed to converge. All the solver configuration I used: Pardiso (instead of MUMPS), Constant Newton (instead of Automatic Newton).
Anyone know any possible solutions for this? Please help, thanks so much.
CN
Hello Chin Neng Leong
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