A two-dimensional finite element mesh generator with automatic transitioning capability

A simple, user friendly, mesh generator designed as a preprocessor for two-dimensional finite element codes is presented. The program generates both triangular and quadrilateral two-dimensional elements and has automatic transitioning capability. The required input is the definition of the boundary of the structure, a measure of the relative size of the mesh at the key geometry points, and loading information.

Both boundary and interior nodal points are generated. The user is not required to develop the overall node and element plan and is not limited to quadrilateral regions with equal number of nodes on opposing sides. The generated mesh density as controlled by the user will automatically transition from low to high density areas.

A bandwidth reduction routine is included to renumber the generated nodes most efficiently. An output file is created of node, element, and nodal load definitions which is organized for input to a finite element program.