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How to involve moisture effect in the material model

How to involve moisture effect in the material model

How to involve moisture effect in the material model

(OP)
Hi groups,
I have a question about material definition.
The material which I am using now will expand as the environmental moisture content increasing.
I can't find any material in the Abaqus match this character.

I am wondering if anyone has experiences with moisture.
It would be really help if you guys can give a hint how to involve it.

RE: How to involve moisture effect in the material model

hi
check the Gel option in pore fluid

RE: How to involve moisture effect in the material model

(OP)
but my material is wood fibre.
It is different from gel.

RE: How to involve moisture effect in the material model

You can code your own material response in the user subroutine UMAT, if there is no built-in material for your problem.

RE: How to involve moisture effect in the material model

Just treat the moisture expansion as a thermal expansion problem.  Enter the moisture swelling coefficients as if they were thermal expansion values, and apply the moisture content as a thermal load, of course being sure to keep the units correct.

RE: How to involve moisture effect in the material model

there is a "thermal-stress" analysis available which might solve your problem.

Janna

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