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simple test case not converging.

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Hi all,

I have a simple setup to understand the logic of COMSOL and FE simulation:

linear elasticity, strutural mechanics interface, time-dependent study type.

a block of aluminum, give a "prescribed displacement" to the whole domain through expression "1*step1(t/1[s])".

The step function is given to introduce a gradual increment of displacement.

what I find mysterious is that:

when the step function possesses an non-zero displacement at t=0. this simple model converges.

However, when the step function starts from zero displacement at t=0. this model does not converge.

what is the reason?


0 Replies Last Post 2019年4月25日 GMT-4 10:38
COMSOL Moderator

Hello Chi Zhang

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