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Study not converging when adding friction
Posted Apr 23, 2022, 3:50 a.m. EDT Structural & Acoustics, Studies & Solvers, Structural Mechanics Version 5.6 0 Replies
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Hi,
I am trying to make a simple 2D model studying the plastic flow of a metal sheet subjected to an indenter. The model is made of a flat bottom tool and a circular top tool which are rigid domains, and a metal sheet in between, which plasticity is modeled by Ludwik's equation. Contact pairs are defined between the plate and each tool. During the study, the upper tool is progressively lowered on the sheet using an auxiliary sweep.
When I am computing the study without adding the friction, the study computes rather fast and without issues. However, this is not representative of reality as friction has a significant effect on the material flow.
When adding friction between the metal sheet and the tools, the study computes well up to a certain point where it never converges. It always seems to crash when the sweep parameter is about 0.6-0.65. I have tried refining the mesh, reducing the auxiliary step, raising the number of iterations, tried different solvers but I never managed to make it converge.
Do you have any idea what could be wrong with my model?
Thank you very much.
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Hello Anthony Ouellet
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