OS-V: 1210 Contact with Friction
A deformable block is slid over a fixed rigid plate using enforced velocities and the problem is solved using an explicit dynamic analysis in OptiStruct. The results from OptiStruct are compared with an equivalent model in Radioss.

Figure 1. Finite Element Model
Benchmark Model
The finite element model consists of a deformable block on which enforced velocities are applied causing it to slide over a rigid fixed block.
Both blocks are meshed with first-order CHEXA elements and frictional contact is defined between the blocks with a friction coefficient = 0.05. The bottom block is constrained in all directions. One side of the top block is constrained along Y direction, while the opposite side is subjected to an enforced velocity and constrained along the X, Y, and Z rotational degrees of freedom. The upper side of the top block is subjected to an enforced velocity and is constrained along the X, Y, and Z rotational degrees of freedom.
Direction | ||
---|---|---|
Y | 565 mm/s | 0.009 s |
Z | -102 mm/s | 0.001 s |

Figure 2. Boundary Conditions
- Property
- Value
- Elastic modulus
- 193000 N/mm2
- Poisson’s ratio
- 0.3
- Density
- 7.75 E-09 tonn/mm3
Results

Figure 3. Comparison of Y displacement for a particular grid (1062)
Model Files
The model file used in this problem includes:
<install_directory>/hwsolvers/demos/optistruct/verification/contact_with_friction.fem