Table of Contents
KIRSH
Thin plane shell in generalized plane state
Description
Element for mechanical analysis with plane shells in generalized plane state (NTANA=7, IANA=5).
Plane membrane element with 2 nodes; the base theory is Kirchhoff (conservation of the perpendicularity of the normal).
No shear deformation. The bending displacement is cubic. The membrane displacement is linear. Marguerre theory is applied. The thickness is actualized.
The numerical integration is done using 1 or 2 Gauss points.
The available material laws are laws HILSH and ILYSH.
Up to 5 elements of contact/load can be coupled to this element (the coupling consists in the remoteness, equal to half the thickness, of the surface of contact with respect to the mean axis).
Type: 41
Implemented by: L. Grisard, 1990
Files
Prepro: KIRSHA.F
Lagamine: KIRSHB.F
Input file
| Title (A5) | |
|---|---|
| Title | “KIRSH” in the first 5 columns |
| Control data (I5) | |
| NELEM | Number of thin shells |
| Definition of the elements (3I5/G10.0) | |
| LMATE | Material law |
| NELMC | Number of contact elements (loading associated to this membrane element (0 ≤ NELMC ≤ 5)) |
| STAB | Number of stabilisation elements |
| THICK | Thickness e of the membrane |
| Definition of the contact/loading elements (4I5) - Only if NELMC ≠ 0 (repeat NELMC times) | |
| NPICNT | Number of integration points for the contact/loading elements (NPICNT ∈ [1, 10]) |
| MATCNT | Number of the contact/loading law |
| IFOND | Number of the foundation (only if contact) |
| INDIC | +1 if contact with top tensioner -1 if contact with bottom tensioner |
| Nodes of the membrane element (2I5) | |
| NODES(I) I=1,2 | Nodes of the element |