Ground Truth Crossfield Guided Mesher-Native Box Imprinting for Automotive Crash Analysis

This paper proposes a meshing strategy and a series of related algorithms of both computation and process used to imprint box shapes around washer holes for automotive carbody crash analysis. A uniquely lightweight, mesher-native, two-dimensional imprinting methodology is described. This imprinting methodology is mesh size and definition sensitive and does not alter or even interrogate geometry or surface triangulation. Two other methods are proposed for face axis determination, namely a minimum oriented bounding box (MOBB) approach and one based on a ground truth frame/crossfield (GTFF/GTCF). Box shapes around washer holes are oriented according to these direction fields. Virtual face decomposition is used to multiblock surfaces into box-with-hole and their boolean mesh areas. While a templatized mesh generator is used for the box-with-hole faces, a hybrid multizone mesher and along with loop-paver are used for the latter. An exhaustively complex mesh quality analysis for automotive body panels clearly justifies the strength of the present approach.