The aim of this test case is to validate the following functions:
The simulation results of SimScale were compared to the results presented in [NAFEMS_R94]. The mesh used in (A) was taken from [SSNA122] and extruded in 3D hexahedral elements. The mesh in (B) was created with the tetrahedralization-with-refinements tool on the SimScale platform.
Import validation project into workspace
Geometry of the sphere
Due to the symmetry of the problem only a quarter of the model is used for the simulation. The punch (DGHJKL) is on top of the foundation (ABCDEF).
| Punch diameter | 100 mm |
| Punch height | 100 mm |
| Foundation diameter | 200 mm |
| Foundation height | 200 mm |
| Fillet radius at the edge of the punch contact | 10 mm |
Tool Type : Code_Aster
Analysis Type : Dynamic
Mesh and Element types :
| Case | Mesh type | Number of nodes | Element type |
|---|---|---|---|
| (A) | linear hexahedral | 7803 | 3D isoparametric |
| (B) | linear tetrahedral | 19353 | 3D isoparametric |
Important
All displacement and load components are referred to the coordinate system in the figure of the geometry section.
Material:
Constraints:
Loads:
| Contact I | Contact II | Contact III | |
|---|---|---|---|
| Solution method | Augmented Lagrange | Penalty | Penalty |
| Contact smoothing | on | on | on |
| Coefficient of contact | 100 | 10¹⁴ | 10¹⁴ |
| Coefficient of friction
μ
|
0 | 0 | 0.1 |
Comparison of the displacements and the normal pressure of the nodes on edge DE. The values of the reference [MARC] in all figures were extracted from [NAFEMS_R94] with WebPlotDigitizer.
[SSNA122] SSNA122 – Benchmark NAFEMS de validation ducontact 2 : punch (rounded edges)
[MARC] The results calculated with MSC.MARC as stated in [NAFEMS_R94] [NAFEMS_R94] 2006 “NAFEMS Advanced Finite Element Contact Benchmarks”, Benchmark 2, NAFEMS Publication Ref: R0094
