VM-WB-MECH-022
VM-WB-MECH-022
Structural Analysis with Advanced Contact Options
Overview
| Reference: | Any basic Strength of Material book |
| Solver(s): | Ansys Mechanical |
| Analysis Type(s): | Nonlinear Static Structural Analysis |
| Element Type(s): | Solid |
Test Case
An assembly of two parts with a gap has a Frictionless Contact defined between the two parts. The end faces of both the parts are fixed and a given displacement is applied on the contact surface of Part 1 as shown below.
Find the Normal stress and Directional deformation - both in the z direction for each part for the following scenarios:
Scenario 1: Interface treatment - adjust to touch.
Scenario 2: Interface treatment - add offset. Offset = 0 m.
Scenario 3: Interface treatment - add offset. Offset = 0.001 m.
Scenario 4: Interface treatment - add offset. Offset = -0.001 m.
Validate all of the above scenarios for Augmented Lagrange and Pure Penalty formulations.
| Material Properties | Geometric Properties | Loading | |||||
|---|---|---|---|---|---|---|---|
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Results Comparison
The same results are obtained for both Augmented Lagrange and Pure Penalty formulations.
| Results | Target | Mechanical | Error (%) | |
|---|---|---|---|---|
| Adjust To Touch | Maximum directional z deformation Part 1 (m) | 6e-4 | 6e-4 | 0.000 |
| Maximum directional z deformation Part 2 (m) | 6e-4 | 5.9786e-4 | -0.357 | |
| Maximum normal z stress Part 1 (Pa) | 2.4e8 | 2.4e8 | 0.000 | |
| Maximum normal z stress Part 2 (Pa) | -2.4e8 | -2.3915e8 | -0.354 | |
| Add Offset. Offset = 0 m | Maximum directional z deformation Part 1 (m) | 6e-4 | 6e-4 | 0.000 |
| Maximum directional z deformation Part 2 (m) | 1e-4 | 0.99644e-4 | -0.356 | |
| Maximum normal z stress Part 1 (Pa) | 2.4e8 | 2.4e8 | 0.000 | |
| Maximum normal z stress Part 2 (Pa) | -4e7 | -3.9858e7 | -0.355 | |
| Add Offset. Offset = 0.001 m | Maximum directional z deformation Part 1 (m) | 6e-4 | 6e-4 | 0.000 |
| Maximum directional z deformation Part 2 (m) | 1.1e-3 | 1.0961e-3 | -0.355 | |
| Maximum normal z stress Part 1 (Pa) | 2.4e8 | 2.4e8 | 0.000 | |
| Maximum normal z stress Part 2 (Pa) | -4.4e8 | -4.3843e8 | -0.357 | |
| Add Offset. Offset = -0.001 m | Maximum directional z deformation Part 1 (m) | 6e-4 | 6e-4 | 0.000 |
| Maximum directional z deformation Part 2 (m) | 0 | 0 | 0.000 | |
| Maximum normal z stress Part 1 (Pa) | 2.4e8 | 2.4e8 | 0.000 | |
| Maximum normal z stress Part 2 (Pa) | 0 | 0 | 0 | |