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Bending of Clamped orthotropic rectangular plate due to uniform load
Posted 2025年2月14日 GMT+8 19:34 Structural Mechanics, Material Models 1 Reply
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Hello, I am trying to model a very simple problem wherein a clamped orthotropic rectangular plate is bending due to a uniform load acting on it. I am modeling it as a Shell wherein Plane stress formulation will be implemented. I am solving it for the following Linear Elastic Material settings: 1. Solid Model: Orthotropic; 2. Material data ordering: Voigt; 3. Young's Modulus: E (User-defined) Ex=130GPa, Ey=130GPa, Ez=0; 4. Poisson's ratio: nu (User-defined) nu_xy=0.28, nu_yz=0, nu_xz=0; 5. Shear modulus: G (User-defined) Gyz=79.6GPa, Gxz=79.6GPa, Gxy=79.6GPa;
Subsequently, the following are the settings in the Shell Local System node: 1. Coordinate System Selection: Global Coordinate System
Extra information: I am using an orthotropic stiffness matrix for silicon with three axes at [100], [010], and[001]. Reference: Hopcroft et al. : What is the Young's Modulus of Silicon? Journal of Microelectromechanical Systems, Vol.19, No.2, April 2010.
My question here is what is coordinate system that COMSOL will use for defining the material properties?
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The material properties are interpreted as in the Shell Local System, that is in your case global (X,Y,Z).
Documentation links:
https://doc.comsol.com/6.3/docserver/#!/com.comsol.help.sme/sme_ug_shell_plate.08.07.html
https://doc.comsol.com/6.3/docserver/#!/com.comsol.help.sme/sme_ug_shell_plate.08.09.html
https://doc.comsol.com/6.3/docserver/#!/com.comsol.help.sme/sme_ug_theory.06.130.html%234576228
-------------------Henrik Sönnerlind
COMSOL