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elements:ssh3d
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SSH3D
3D solid-shell element
Description
Type: 23
Implemented by: A. Ben Bettaieb, L. Duchêne, A-M. Habraken (2009)
Files
Prepro: SSH3DA.F
Lagamine: SSH3DB.F
Input file
| Title (A5) | |
|---|---|
| TITLE | “SSH3D” in the first 5 columns |
| Control data (4I5) | |
| NELEM | Number of elements |
| NEAS | Number of EAS modes (Enhanced Assumed Strain), between 1 and 30 |
| ILOAX | = 0 for global axis computation ☛ Objectivity must be verified in the material law (with Jaumann correction) ☛ No rotation of material axes |
| < 0 for computation with constant and symetrical velocity gradients pseudo local axes : use of local axes on the time step but no evolution of the local axes on the following time step ☛ Objectivity is verified ☛ No rotation of material axes |
|
| > 0 for computation with local axes ☛ Objectivity is verified ☛ Rotation of material axes |
|
| units: = 1 for rotations incorporated in local tangent matrix  Not available = 2 apply final rotation to local tangent matrix = 3 apply initial rotation to local tangent matrix = 4 compute tangent matrix through global perturbation method |
|
| tens (only for ILOAX>0): = 0 for local axes e1, e2, e3 initially parallel to global axes ex, ey, ez = 1 for local axes e1, e2 given (and e3=e1∧e2) = 2 for local axes e1, e2 initially in the plane (ex, ey) forming an angle θ with ex, ey (and e3=e1∧e2) = 3 same as 1 with different local axes for each element = 4 same as 2 with different local axes for each element |
|
| NPTH | Number of integration points on the width (in the ζ direction) of the element (NPTH ∈ [2,10]). The number of integration points in the ξ-η plane is equal to 4. |
| 1 to 3 lines depending on NEAS value - List of EAS modes (14I5) | |
| EAS(List1) | List of 1:NEAS if NEAS ∈ [1,14] or 1:14 if NEAS > 14 |
| EAS(List2) | List of 15:NEAS if NEAS ∈ [15,28] or 15:28 if NEAS > 28 |
| EAS(List3) | List of 29:NEAS if NEAS ∈ [29,30] |
| Definition of the elements (I5/8I5) | |
| LMATE | Material law |
| NODES(8) | List of nodes |
Results
Cauchy stresses in global axes $\sigma_x,\sigma_y,\sigma_z,\sigma_{xy},\sigma_{xz},\sigma_{yz}$
Order of the integration points
Starting from negative coordinates, one varies:
- the ξ
- the η
- the ζ
Example for 8 IP:
- ξ = -0,57; η = -0,57; ζ = -0,57
- ξ = -0,57; η = -0,57; ζ = +0,57
- ξ = -0,57; η = +0,57; ζ = -0,57
- ξ = -0,57; η = +0,57; ζ = +0,57
- ξ = +0,57; η = -0,57; ζ = -0,57
- ξ = +0,57; η = -0,57; ζ = +0,57
- ξ = +0,57; η = +0,57; ζ = -0,57
- ξ = +0,57; η = +0,57; ζ = +0,57
elements/ssh3d.txt · Last modified: 2020/08/25 15:46 (external edit)
