SSPB
SSPB, B11
, B21
, B31
, B22
, B32
, B33
, T, B12
, B13
, B23
Specifies a preintegrated coupling stiffness for shell
sections.
-
B11,B21,B31,B22,B32,B33 Coupling stiffness component (symmetric lower part of submatrix [
B]).-
T Temperature.
-
B12,B13,B23 Upper part of submatrix [
B]
Notes
The behavior of shell elements is governed by the generalized-stress/generalized-strain relationship of the form:
If the coefficients B12
, B13
, B23
are undefined, the program uses a symmetric form of submatrix [
B
]. If any one of the coefficients B12
, B13
, B23
is nonzero, the program considers submatrix [
B
] to be unsymmetric.
The SSPB command, one of several preintegrated shell
section commands, specifies the coupling stiffness quantity
(submatrix [
B
] data) for a preintegrated shell section. The section data defined
is associated with the section most recently defined (via the SECTYPE command).
Unspecified values default to zero.
Related commands are SSPA, SSPD, SSPE, SSMT, SSBT, and SSPM.
If you are using the SHELL181 or SHELL281 element's Membrane option (KEYOPT(1) = 1), it is not necessary to issue this command.
For complete information, see Creating a Preintegrated General Shell Section.