The aim of this test case is to validate the following functionalities:
The simulation results of SimScale were compared to the results in [NAFEMS_R27]. The tetrahedral meshes used were created with the parametrized-tetrahedralization-tool on the SimScale platform.
Import validation project into workspace
Tool Type : Code_Aster
Analysis Type : Static – nonlinear
Mesh and Element types :
Case | Mesh type | Number of nodes | Creep formulation | Element type |
---|---|---|---|---|
(A) | 2nd order hex | 20 | Norton | 3D standard |
(B) | 2nd order hex | 20 | Norton | 3D reduced |
(C) | 2nd order hex | 20 | Time Hardening | 3D standard |
(D) | 2nd order hex | 20 | Time Hardening | 3D reduced |
(E) | 2nd order tet | 21 | Norton | 3D standard |
(F) | 2nd order tet | 21 | Norton | 3D reduced |
(G) | 2nd order tet | 21 | Time Hardening | 3D standard |
(H) | 2nd order tet | 21 | Time Hardening | 3D reduced |
Material:
linear elastic, isotropic: E = 200 GPa, ν
$\nu $= 0.3
– Norton, A = 8.6805556e-48, n = 5
– Time Hardening, A = 8.6805556e-48, n = 5, m = 0
Important
Constraints:
m
m
m
mm
mm
mm
Advanced Automatic Time Stepping:
Comparison of the average Cauchy stress σxx
${\sigma}_{xx}$of the cube after a creep time of 3.6e6 s (1000 h) with the solution presented in [NAFEMS_R27]:
Case | time [s] | [NAFEMS_R27] | SimScale | Error (%) |
---|---|---|---|---|
(A) | 3600000 | 1007.7 | 1008.23 | -0.053 |
(B) | 3600000 | 1007.7 | 1008.23 | -0.053 |
(C) | 3600000 | 1007.7 | 1008.23 | -0.053 |
(D) | 3600000 | 1007.7 | 1008.23 | -0.053 |
(E) | 3600000 | 1007.7 | 1008.23 | -0.053 |
(F) | 3600000 | 1007.7 | 1008.23 | -0.053 |
(G) | 3600000 | 1007.7 | 1008.23 | -0.053 |
(H) | 3600000 | 1007.7 | 1008.23 | -0.053 |
[NAFEMS_R27] | (1, 2, 3) (1993) “NAFEMS Fundamental Tests of Creep Behaviour”, Test 6(b), NAFEMS Publication Ref: R0027 |