13.7 Element Shape Testing
Kelley, Stan
Chapter 13, Ansys Theory Reference, Ninth Edition. SAS IP, Inc., Ansys Inc., 1998
All continuum elements (2-D and 3-D solids, 3-D shells) are tested for acceptable shape as they are defined by the E, EGEN, AMESH, VMESH, or similar commands. This testing, described in the following sections, is performed by computing shape parameters (such as Jacobian ratio) which are functions of geometry, then comparing them to element shape limits whose default values are functions of element type and settings (but can be modified by the user on the SHPP command with Lab=MODIFY as described below). Nothing may be said about an element, one or more warnings may be issued, or it may be rejected with an error.
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