Degenerated elements within a substructure

This problem contains basic test cases for one or more Abaqus elements and features.

This page discusses:

Elements tested
Features tested
Problem description
Results and discussion
Input files

ProductsAbaqus/Standard

Elements tested

CPS8

Features tested

The ability to incorporate degenerated elements into a substructure definition is tested.

Problem description

A planar substructure is formed from standard CPS8 elements and CPS8 elements degenerated into 6-node triangles. Both displacement degrees of freedom are retained at selected nodes on the substructure that is constrained as depicted below, and a displacement of 0.2 in the x-direction is prescribed for the three nodes along x=1.0.

Results and discussion

The results are identical to the analytical results where a stress of 6 × 10⁶ develops in the direction of extension.

Input files

psupdgn1.inp: Uses CPS8 and degenerated CPS8 elements.
psupdgn1_gen.inp: Substructure generation file referenced in the analysis psupdgn1.inp.