Applications of Energy Release Rate Techniques to Part-Through Cracks in Plates and Cylinders. Volume 1. ORMGEN-3D: A Finite Element Mesh Generator for 3-Dimensional Crack Geometries.

摘要

This report (Volume 1) describes the ORMGEN-3D (Oak Ridge Mesh GENerator - 3D) finite element mesh generator program for computational fracture mechanics analysis. The program automatically generates a three-dimensional (3-D) finite element model for six different crack geometries. These geometries include flat plates with straight or curved surface cracks and cylinders with part-through cracks on the outer or inner surface. Mathematical or user-defined crack shapes may be considered. ORMGEN-3D generates a core of special wedge or collapsed prism elements at the crack front to introduce the appropriate stress singularity at the crack tip. Regular 20-node isoparametric brick elements are used elsewhere in the modeling. Also, a cladding option is available that allows for an embedded or penetrating crack in the clad material. As few as four input cards are required to execute the program.