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Mismatch about strain-stress and Young's modulus

Posted 24 mai 2020, 11:35 UTC−4 Structural & Acoustics, Structural Mechanics Version 5.5 1 Reply

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Hi everyone!

I am doing structural analysis and I got a problem about the stress and strain. For a simple solid cube, the input Young's modulus is 2.8GPa while the obtained ratio of stress and strain is 3.2GPa. The stress is integration of tensor of the loading surface; the strain is ratio of the displacement and original length.

Is my extraction about stress and strain wrong or any missing about the model ?

Thanks in advance.

1 Reply Last Post 25 mai 2020, 15:37 UTC−4
Henrik Sönnerlind COMSOL Employee

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Posted: 5 years ago 25 mai 2020, 15:37 UTC−4

Is the stress state truly uniaxial?

Is geometric nonlinearity involved? If so, you must be careful about which stress measure and integration area you used.

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Henrik Sönnerlind
COMSOL
Is the stress state truly uniaxial? Is geometric nonlinearity involved? If so, you must be careful about which stress measure and integration area you used.

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