How to involve moisture effect in the material model

[lisw]

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.

 

[hamadadf]

hi
check the Gel option in pore fluid

 

[lisw]

but my material is wood fibre.
It is different from gel.

 

[xerf]

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

 

[SWComposites]

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.

 

[janna06]

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

Janna