Multi-Material Topology Optimization Method to Minimize the Mass While Meeting Body Stiffness, c Crashworthiness and Vibration Performance Requirements Simultaneously

Abstract

The topology optimization helps realize highly rigid yet lightweight multi-material vehicle bodies for lower CO2 emissions. We developed a topology optimization method aimed at minimization of the mass of multiple materials, with stiffness, dynamic large deformation, and vibration performance requirements as constraints. Applying this method to an L-shaped member with steel and aluminum materials, we achieved an optimal structure and all the objective functions converged to the desired level. Consequently, an optimal shape was obtained that places each material in the right place, simultaneously satisfies stiffness, dynamic large deformation, and vibration performance requirements, and minimizes the mass.