My Workbench model has shell elements in it. Contact is used to connect shell parts together. However, I notice irregularities in the stresses at the contact interfaces (tremendous variations in stress values -- both hot spots and cold spots). What is wrong?
|
There is a known bug for edge-surface and surface-surface contact in WB when the underlying mesh on the target surface contains a mix of triangular and quadrilateral lower-order element faces. This is most commonly encountered in corner-noded shell models. In this situation, all the target elements are created as triangles, with only one triangular element overlying each quadrilateral shell element. This leaves triangular holes all over the target surface, causing irregular contact definition. This bug affects WB 8.0 and 8.1. Workarounds for these versions include: 1. Create an all-quad mesh on the target surfaces (when possible). The target element shapes are correct if there are no triangular faces on the target surface. 2. Take the model into Traditional ANSYS, redefine the contact pairs, and solve in the Traditional ANSYS environment. 3. For bonded contact, use the Beta WB feature, "Beam contact". This bug is fixed in 9.0. |
||
|