Spot Weld/Adhesive Pattern Optimization

Abstract

This research presents a new application of topology optimization. Patterns for spot weld location and adhesive distribution when joining body panels are determined by using the topology optimization method. The density method which parameterizes the density of each finite element is employed and a sequential linear programming method is used for solving the topology optimization problem. In this study, a B-Pillar to Rail Joint exemplifies the design methodology. The results show that patterns for optimal spot weld location and adhesive distribution can be obtained for a maximum stiffness design with mass constraints.

Optimization of spot-weld joints

“…In the literature, there are a few studies related to optimization of spot-weld number and locations [14,15,19,20], regarding stiffness and fatigue behaviour. A topology optimization algorithm was used in references [14], [19] and [21] and the maximum stress intensity factor of spot welds, which is a control parameter for the fatigue life of the structure, was minimized in a spot-welded structure.…”