Abaqus Volume II: I–Z Bedienungsanleitung PDF herunterladen (Seite 144)

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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 th e 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 ABA QUS/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 d ata line will be ign ored. Instead, the

NODAL THICKNESS option is used to

deﬁne the section thickness.

13.9–2

ABAQUS Version 6.1 Module:

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