P. To display plate results along a cut line
To view the plate stresses along an arbitrary line cut across plate elements, use the following procedure.
Given a finite element, ABCD, which is subject to a set of stresses, it is possible using mechanics theory to cut that element along an arbitrary line, EF, and resolve the forces at the cut surface.
However, the forces of adjacent finite elements obtained this way are not balanced (i.e., not in equilibrium) and the stress values are discontinuous across element boundaries.
STAAD.Pro has stress result options for cut lines which employ a method of mathematically processing the FEA stress results which are then in equilibrium against the cross-section forces and are continuous across element boundaries. The cut line coordinate system, STR, is used (i.e., a local coordinate system with S as the axis along the cut line, T in the plane of the elements, and R normal to those elements).
The graph displays the selected stress values along the cut line using the number of divisions per element specified.
Forces listed in the table when these results are selected are given in the in a
coordinate system relative to the cut line (i.e., FS
is along the
cut line, FT
is in the plane of the element, and FR
is normal to the element). This is indicated by the -Line
suffix of the results.
The table has two tabs: Stresses and Total Force. In the case of -Line
stress types, the forces are given in the local cut line coordinate system:
- Fs
- Resultant force along the cutline
- Ms
- Resultant moment about the cutline
- Ft
- Resultant force perpendicular to the culine in the plane of the plate
- Mt
- Resultant moment about the line perpendicular to the cutline in the plane of the plate
- Fr
- Resultant force perpendicular to the cutline out of the plane of the plate
- Mr
- Resultant moment about the line perpendicular to the cutline out of the plane of the plate