P39

A Summary For the Day

• FEM uses the derivates of the strain energy function to obtain the force.

• FVM uses the integral of the interface traction to obtain the force.

• The two approaches lead to the identical outcome, in different formulations

• Hyperelastic models define the strain energy function by principal stretches, i.e., the singular values of the deformation gradient.

• For isotropic materials, we can calculate the stress through diagonalization.

✅ Level：1. 了解，会用；2. 理解、举一反三；3. 跳出图形学；
✅ 图形学关注的不是数学模型，而是快。

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https://caterpillarstudygroup.github.io/GAMES103_mdbook/