Difference-based Equivalent Static Load Method with adaptive time selection and local stiffness adaption

Abstract Structural optimization of crash-related problems usually involves nonlinearities in geometry, material, and contact. The Equivalent Static Load (ESL) method provides a to solve such problems. It has previously been extended employ an individual Finite Element model describing the deformed geometry at each considered time step under name Difference-based (DiESL) method. This paper demonstrates how appropriate selection steps cycle can further improve convergence behavior DiESL is shown that adaptive leads better objective values more reliable presumed global optimum. Furthermore, extension enables adaption path-dependent structural properties original nonlinear problem like material stiffness linear auxiliary load case. In this paper, Young’s modulus on element level corresponding local plasticization dynamic successfully implemented. Here, test examples indicate observable improvement only be obtained if neither elements elastic nor plastic range are dominating structure’s behavior.