New applications of topology optimization in automotive industry

Topology optimization is used for obtaining the best layout of vehicle stru ctural components to achieve predetermined performance goals. In this resea rch, the structural topology optimization based on density formulation is e mployed. The topology design problem is formulated as a general optimizatio n problem and is solved by mathematical programming methods so that the obj ective and the constraint functions can be any structural performance measu re. Design variables for this formulation parameterize the material of each element. NASTRAN-based finite element codes are employed for the response analyses. Traditionally, the topology optimization is used in body and chas sis structures for determining optimal structural layouts. In this research , new applications including weight reduction, manufacturing process select ion, weld and bead pattern designs for three-dimensional automotive example s are presented and discussed.