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simple test case not converging.
Posted Apr 25, 2019, 10:38 a.m. EDT Structural & Acoustics Version 5.4 0 Replies
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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?
Hello Chi Zhang
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