OS-V: 0220 3D Punch (Rounded Edges)

OptiStruct FE results examine the plot of contact pressure, tangential stress against radial distance from the center of contact and relative tangential slip against distance from the center of contact. OptiStruct also examines the 3D contact, stick/slip behavior along the contact plane, compares the linear and quadratic elements and the plasticity.

Benchmark Model

Hexa8 and Hexa20 elements are used to create one quarter model with punch diameter 100mm, punch height 100mm, foundation diameter 200mm, foundation height 200mm and fillet radius at the edge of the punch contact is 10mm. A uniform pressure of 100N/mm2 is applied at the top surface of the punch. The bottom surface of the foundation is fixed. Two different contact properties are used, one with coefficient of friction 0.0 and the second with coefficient of friction 0.1. The straight edge of the foundation is considered as the main surface and the nodes on the bottom edge of the punch are selected as the secondary surface.

Nonlinear Static Analysis Results

Figure 2. Axial displacement as a function of the radial coordinate (friction coefficient 0.0 and 0.1) obtained with linear elastic elements

Figure 3. Radial displacement as function of the radial coordinate (friction coefficient 0.0 and 0.1) obtained with linear elastic elements

Figure 4. Axial displacement along top surface of foundation (with friction)

Figure 5. Radial displacement along top surface of foundation (with friction)

Figure 6. Effect of different friction coefficient and method of fiction handling on the radial displacement of the foundation edge (Linear Elements)

Model Files

Refer to Access the Model Files to download the required model file(s).

Reference

NAFEMS R0094 - Advanced finite element contact benchmarks, Konter 2006