Hertz Formulation

Block Format Keyword The formulation is similar to a penalty formulation; but with a physical penalty stiffness based on Hertz contact theory.

Table 1. Interface Type with Hertz Formulation

Contact Treatment		Types	Application	Description
Hertz Formulation	Slide / Void	/INTER/HERTZ/TYPE17	Meshes with 16-node thick-shell or 20 bricks	Using Hertz contact theory to describe impact between external surface of two brick groups.