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Compute Comsol

Posted Jul 19, 2021, 5:35 a.m. EDT 2 Replies

Malgorzata Wojcik, PhD The CHEMKOP Company
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Hello, Can you help me? Undefined value found. - Detail: Undefined value found in the stiffness matrix. There are 15 equations giving NaN/Inf in the matrix rows for the variable comp1.solid.ece. at coordinates: (14.899,-1263.63), (19.3497,-1272.16), (6.84974,-1272.16), (63.2716,-1261.13), (68.9429,-1271.53), ...

There are 15 degrees of freedom giving NaN/Inf in the matrix columns for the variable comp1.solid.ece. at coordinates: (14.899,-1263.63), (19.3497,-1272.16), (6.84974,-1272.16), (63.2716,-1261.13), (68.9429,-1271.53), ...

Sincerely, Malgorzata

2 Replies Last Post Jul 20, 2021, 3:43 a.m. EDT
Robert Koslover Certified Consultant
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Posted: 3 years ago Jul 19, 2021, 11:20 a.m. EDT

I don't think anyone can tell you how to fix your problem based only on that information. I suggest that you: (1) Explain what kind of problem you are trying to solve, and (2) how you are trying to solve it, and (3) post your model (the .mph file) to the forum.

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
I don't think anyone can tell you how to fix your problem based only on that information. I suggest that you: (1) Explain what kind of problem you are trying to solve, and (2) how you are trying to solve it, and (3) post your model (the .mph file) to the forum.
Henrik Sönnerlind COMSOL Employee

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Posted: 3 years ago Jul 20, 2021, 3:43 a.m. EDT

I agree with you Robert that there is not enough information. But I will make an attempt anyway:

My guess is that the creep strain rate approaches infinity in a solid mechanics problem. Bad material data, or too large time steps maybe.

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Henrik Sönnerlind
COMSOL
I agree with you Robert that there is not enough information. But I will make an attempt anyway: My guess is that the creep strain rate approaches infinity in a solid mechanics problem. Bad material data, or too large time steps maybe.

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