ABAQUS Volume II: I–Z - Manual (Page 144)

*MEMBRANE SECTION
NODAL THICKNESS
Include this parameter to indicate that the membrane thickness should not be read from the data lines
but should be interpolated from the thickness specified at the nodes with the *NODAL THICKNESS
option.
ORIENTATION
Set this parameter equal to the name given for the *ORIENTATION option to be used to define a
local coordinate system for material calculations in the elements in this set.
POISSON
This parameter is relevant only in a large-deformation analysis. Set it equal to a nonzero value
to cause the thickness to change as a function of membrane strains. The value of the POISSON
parameter must be between −1.0 and 0.5. A value of 0.5 will enforce incompressible behavior of
the element. POISSON=0.0 means that the thickness will not change.
Set this parameter equal to MATERIAL in an ABAQUS/Explicit analysis to cause the thickness
to change based on the element material definition.
The default is POISSON=0.5 in ABAQUS/Standard and POISSON=MATERIAL in
ABAQUS/Explicit.
Data line for a constant thickness membrane:
First (and only) line:
1. Section thickness.
To define a continuously varying thickness membrane:
No data lines are used with this option when the NODAL THICKNESS parameter is specified; any
value input on the data line will be ignored. Instead, the *NODAL THICKNESS option is used to
define the section thickness.
13.9–2
ABAQUS Version 6.1 Module: ID:
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