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.
The cyclic stress-strain behavior in notched and unnotched [±45] 3s AS4/ PEEK thermoplastic composite laminates was studied. A plasticity model for cyclic deformation developed for unidirectional thermoplastic composites was used to describe the behavior of each lamina, and the laminate behavior was obtained by using the classical lamination theory. Model predictions of stress-strain curves were compared with experimental results.
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