Table of Contents
MEM2D
Plane membrane in 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; linear interpolation of displacements. The thickness is actualized.
The numerical integration is done using 1 or 2 Gauss points. Two points may be necessary to take into account phenomena linked to the generalized plane state correctly.
The available material laws are laws HILSH and ILYSH.
Initial stresses are permitted.
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: 40
Implemented by: L. Grisard, 1991
Files
Prepro: MEM2DA.F
Lagamine: MEM2DB.F
Input file
| Title (A5) | |
|---|---|
| Title | “MEM2D” in the first 5 columns |
| Control data (I5) | |
| NELEM | Number of membrane elements |
| Definition of the elements (3I5/3G10.0) | |
| NPI | Number of integration points (Default value =1) |
| LMATE | Material law |
| NELMC | Number of contact elements (loading associated to this membrane element (0 ≤ NELMC ≤ 5)) |
| THICK | Thickness e of the membrane |
| SIG1 | Initial normal stress $\sigma_x$ in the local direction x |
| SIG2 | Initial normal stress $\sigma_z$ in the local direction z |
| Definition of the contact/loading elements (3I5) - 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) |
| Nodes of the membrane element (2I5) | |
| NODES(I) I=1,2 | Nodes of the element |