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SHELL SECTION
be at least 3, except in a pure heat transfer analysis, where the number of integration points
can be 1 for a constant temperature through the shell thickness.
Data lines to define a composite shell (the COMPOSITE parameter is included):
First line:
1. Layer thickness. This value is modified if the NODAL THICKNESS param eter is included.
2. Number of integration points to be used through the laye r. The default is three points if
Simpson’s rule is used and two points i f Gauss quadrature is used. The number of integra tion
points must be an odd number for Simpson’s rule and, in an ABA QUS/Standard analysis,
determines the number of temperature degrees of f reedom at a node of the element if this
section is associated with heat transfer or coupled temperature-displacement elements. This
number must be less than or equal to 7 for Gauss quadrature.
3. Name of the material forming this layer.
4. Name of the orientation to be used with this layer or the orientation angle,
, (in degrees)
measured positive counterclockwise relative to the orientation definition given with the
ORIENTATION param eter, where
. If the ORIENTATION parameter is
not included,
is measured relative to the default shell local directions (see “Orientations,”
Section 2.2.5 of the ABAQUS Analysis User’s Manua l).
Repeat this data line a s often as necessary. Use one data line for each layer of the she ll. The order of
the laminated shell layers with respect to the positive direction of the shell nor mal is defined by the order
of the data lines.
18.15–4
ABAQUS Version 6.1 Module:
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