Multi-disciplinary Topology Optimization for Vehicle Bonnet Design

Bonnet Pedestrian Head lmpact and Structural Stiffness and Strength targets have conflicting design requirements which currently result in design compromises, and the current CAE methods use different models and solvers. This paper highlights a new CAE capability to provide Multi-Disciplinary Optimization of bonnet geomety to achieve the conflicting Pedestrian Head Impact and structural stiffness/strength targets at lowest weight and cost. The aim has been to combine all bonnet load cases using one code "LS-DYNA" and cary out trade-oft and optimize weight using LS-OPT. A new developed topology process employing VR&D Genesis for HIC optimisation is presented and compared mih LS-TASC tools for a generic bonnet design.