第２部門④

[22007-12-03] Accuracy Verification of Sensitivity for Elasto-plastic Topology Optimization at The Elastic Unloading Point (Proceedings of Symposium on Applied Mechanics)

*Mutsuki Fujiwara¹, Hiroya Hoshiba¹, Koji Nishiguchi¹, Junji Kato¹ (1. Nagoya University)

Keywords:Topology Optimization, Elasto-plastic Material, Elastic Unloading

Topology optimization is a design method that has been developing rapidly in recent years, but has not been used much for designing nonlinear problems due to the difficulty of sensitivity analysis caused by path dependence and other factors. To address this problem, Kato, Hoshiba, et al. succeeded in reducing the computational complexity of sensitivity analysis by neglecting the implicit derivative term in the sensitivity analysis. However, it is known that reliable sensitivity has not been obtained for cyclic unloading. In this study, the accuracy of sensitivity under repeated unloading will be investigated based on the method of Hoshiba et al.