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Section 5
5-111
Notes
1. All releases are in the local axis system. See Figure 1.13 for
the various degrees of freedom. Fx and Fy have the same sense
as Sx and Sy in Figure 1.13. Fz has the same sense as SQx or
SQy. Generally, do not over release. The element must still
behave as a plate after the releases.
2.
Selfweight is applied at each of the nodes as if there were no
releases.
3.
Thermal stresses will include the fixed-end thermal pre-stress
as if there were no release.
4.
May not be used with the Element Plane Stress or Element
Ignore Inplane Rotation commands on the same element.
5. Note that the usual definitions of local Mx and My are reversed
here. See Figure 1.13 for the definitions of Mx and My.
Releasing Fz, Mx, My will release all bending capability.
Releasing Fx, Fy, Mz will release all in-plane stiffness.