General contact detection algorithm for finite element analysis.

摘要

A contact detection algorithm has been developed to address difficulties associated with the numerical simulation of contact in nonlinear finite element structural analysis codes. Mechanics problems which have self-contacting surfaces, tearing and eroding surfaces, and multi-body impact are solved using the new algorithm. The proposed algorithm is portable between dynamic and quasi-static codes and can efficiently model contact between a variety of finite element types including shells, bricks, beams and particles. The algorithm is composed of (1) a location strategy that uses a global search to decide which slave nodes are in proximity to a master surface and (2) an accurate detailed contact check that uses the projected motions of both master surface and slave node. The capability of the new algorithm is illustrated with several example problems.