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Define rigid body rotation if the radius is assumed to deform homogeneously
Posted Aug 3, 2023, 1:13 p.m. EDT Modeling Tools & Definitions, Structural Mechanics, Physics Interfaces Version 6.0 0 Replies
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Dear Comsol professionals:
I met some problems defining boundary conditions while using 3D solid mechanics (stationary) to model the torsion of a cylinder. My goal is to model the deformation of the cylinder assuming that the radius deforms homogeneously. For example, if the original radius is 0.01m. After the deformation, the radius of the whole cylinder becomes 0.011m. And the height of the cylinder is assumed to be constant.
Now I set flexible rigid body at both ends, with theta=0 at one end (lower plane), and theta=theta_0 at another end (upper plane). The displacement of the center of rotation is (0,0,0) on both ends. Hyperelastic material is used and nearly incompressible St Venant-Kirchhoff material is chosen.
How could I define the boundary conditions to reach the goal?
Hello Zack Pan
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