I'm trying to define the water absorption of polymeric composites in Ansys/Abaqus. The problem I don't know is what should be considered in this regard?
Hi Moslem,
it depends on the phenomena you want to describe. If you want to model fluid diffuison Abaqus has a diffusion step analysis. You can define the diffusivity and solubility of the material and the initial water concentration (Edit Material - Other - Mass Diffusion). When assigning the material diffusivity make sure to define "Fick" or "General" law, based on your material definition.
You need to use diffusive heat/mass transfer elements, for example DC3D8. It is also important to define the absolute zero temperature for the analysis to run (Model - Edit Attributes - Absolute Zero Temperature).
If you need more info we can have a look at your model.
Best regards
Abedin
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