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variable names to define user-defined materials
Posted Sep 14, 2023, 11:48 a.m. EDT Materials, Structural Mechanics Version 6.0 1 Reply
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Hey there,
I'm seeking assistance in understanding how to define user-defined materials in COMSOL, particularly with regard to the nomenclature of specific quantities.
For example, I've come across terms like 'solid.Cel11' representing the isochoric elastic Cauchy-Green tensor and 'solid.cxx' for the Cauchy-Green tensor's xx component. some more examples: Density: Variable Name: solid.density
Young's Modulus: Variable Name: solid.E
Shear Modulus: Variable Name: solid.G
Is there a resource or compilation available that provides a comprehensive list of these variable names and their corresponding descriptions within COMSOL. I then intend to use these variable names to create my own user-defined material.
I am more specifically look for variable names for quantities involved in the solid mechanics module. I have attached a snapshot for your reference.
Thanks, Ashish
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A full list of variables would contain about 10000 entries for structural mechanics only, so it is not feasible to maintain such a list in the documentation. Furthermore, most variables are defined only under certain conditions.
As an example, the variables that you mention, solid.E and solid.G would only be defined in domains where a linear elastic material is selected. If you are, for example, working with a user-defined hyperelastic material, they are not.
The best approaches when searching for a certain variable is either to look in Equation View for the feature that defines it, of use the search functionality (Ctrl-F).
-------------------Henrik Sönnerlind
COMSOL