OS-V: 0240 3D Steel Roller on Rubber
Contacts Benchmark 3For Quasi-static analysis using Linear elastic material, geometric non-linearity and nonlinear boundary conditions.
Figure 1.
Benchmark Model
Hexa8 elements are used to create one half of the model. The Steel is of 20mm width and 30mm radius, the rubber mat is 22mm wide, 20mm in high and 360mm long. The steel roller starts rolling from a point 60mm from the left-hand side of the rubber mat. The center of the roller is fixed in horizontal and vertical direction, for a time period of 0-1 second the bottom surface of the rubber is displaced 3mm in the negative y direction, the sheet x-displacement is fixed and there is no roller rotation. For the time period of 1-2 second the bottom surface of the rubber sheet is held at 3mm y-displacement and rotation of 360 degrees is prescribed to the steel roller where the sheet is free to move in horizontal direction. There is no force applied on the system and the coefficient of friction between the two surface is 0.3. The nodes on the outer surface of the roll are selected as main nodes, while the nodes on the top surface of the mat are specified as the secondary nodes.
- Esteel
- 210 kN/mm2
- Nsteel
- 0.3
- C10, rubber
- 10 N/mm2 (Neo Hookean material description)
- D1rubber
- 0.0001
Nonlinear Static Analysis Results
| Horizontal Displacement (mm) | NAFEMS | OptiStruct | Normalized |
|---|---|---|---|
| 3D first order elements | 182.9 | 182.06 | 1.00461386 |
Figure 2. Vertical Forces on the Roller versus Time
Figure 3. 3D Analysis – Undeformed and Contour Plots of Contact Pressure on Deformed Structure
Model Files
The model files used in this problem include:
<install_directory>/hwsolvers/demos/optistruct/verification/contb5H8.fem
Reference
NAFEMS Ltd, The Standard NAFEMS BENCHMARKS TNSB Rev. 3, NAFEMS Ltd, Scottish Enterprise Technology Park, Whitworth Building, East Kilbride, Glasgow, United Kingdom, 1990.