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Gradually change material parameter(s) as a function of the domain position
Posted Jun 12, 2017, 8:16 a.m. EDT 1 Reply
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Hi,
I am trying to model a material in which one or more material parameter changes throughout the material as a function of the position in the material domain. This could for instance be a material density that changes with the distance from the material surface.
Is it possible to model such effects in COMSOL or will I need to simplify my approach and go with two or more distinct domains in which I define discretely varying material parameters?
Any input will be much appreciated.
Best Regards
Christian
I am trying to model a material in which one or more material parameter changes throughout the material as a function of the position in the material domain. This could for instance be a material density that changes with the distance from the material surface.
Is it possible to model such effects in COMSOL or will I need to simplify my approach and go with two or more distinct domains in which I define discretely varying material parameters?
Any input will be much appreciated.
Best Regards
Christian
1 Reply Last Post Jun 12, 2017, 8:38 a.m. EDT
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Posted:
7 years ago
Hello Christian,
COMSOL's GUI is interpreted, so don't hesitate to use a mathematical expression for a material property. For instance if you want to model some sort of engineered material with a spatially varying Young's modulus, you could type an expression like "1+x" (without the quotation marks) in the text field for the Young's modulus. Those expressions can depend not only on the spatial coordinates, but also on unknowns solved by the analysis, like temperature, etc. You can certainly make use of this to have properties that vary with how far from the surface a point is; see www.comsol.com/blogs/tips-using-wall-distance-interface/ .
Best regards,
Jeff
COMSOL's GUI is interpreted, so don't hesitate to use a mathematical expression for a material property. For instance if you want to model some sort of engineered material with a spatially varying Young's modulus, you could type an expression like "1+x" (without the quotation marks) in the text field for the Young's modulus. Those expressions can depend not only on the spatial coordinates, but also on unknowns solved by the analysis, like temperature, etc. You can certainly make use of this to have properties that vary with how far from the surface a point is; see www.comsol.com/blogs/tips-using-wall-distance-interface/ .
Best regards,
Jeff