ansys.mapdl.core.Mapdl.sspb

Mapdl.sspb(b11='', b21='', b31='', b22='', b32='', b33='', t='', b12='', b13='', b23='', **kwargs)

Specifies a preintegrated coupling stiffness for shell sections.

Mechanical APDL Command: SSPB

Parameters:

b11str

Coupling stiffness component (symmetric lower part of submatrix [ B ]).

b21str

Coupling stiffness component (symmetric lower part of submatrix [ B ]).

b31str

Coupling stiffness component (symmetric lower part of submatrix [ B ]).

b22str

Coupling stiffness component (symmetric lower part of submatrix [ B ]).

b32str

Coupling stiffness component (symmetric lower part of submatrix [ B ]).

b33str

Coupling stiffness component (symmetric lower part of submatrix [ B ]).

tstr

Temperature.

b12str

Upper part of submatrix [ B ]

b13str

Upper part of submatrix [ B ]

b23str

Upper part of submatrix [ B ]

Notes

The behavior of shell elements is governed by the generalized-stress/generalized-strain relationship of the form :

\[equation not available\]

If the coefficients B 12, B 13, B 23 are undefined, the program uses a symmetric form of submatrix [ B ]. If any one of the coefficients B 12, B 13, B 23 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