博士论文答辩：基于非同步变分积分器的动态断裂相场法
日期：2023/11/13
博士论文答辩：基于非同步变分积分器的动态断裂相场法
主讲人：Zongwu Niu, Ph.D. candidate at UM-SJTU Joint Institute
时间：2023年11月13日（周一）下午14:00
地点：密西根学院龙宾楼414B会议室
讲座摘要
This dissertation proposed asynchronous variational integrators for the phase field approach to dynamic fracture. First, a hybrid explicit-implicit asynchronous scheme is proposed and two important phase field variants are studied. Furthermore, an explicit-explicit asynchronous formulation with time adaptivity is developed, accounting for the rate-dependent phase field model. Finally, the AVI is extended to contact problems involving elastoplastic solids with non-associated plasticity model with volumetric hardening. These asynchronous formulations allow each element in the mesh to have dependent local time step and updates the elements and nodes asynchronously, which speeds up the computational efficiency significantly.
主讲人简介
Zongwu Niu received the B.S. degree from Henan university of science and technology in 2016 and the M.S. degree from Zheng Zhou University in 2019. He is a Ph.D. candidate in the University of Michigan–Shanghai Jiao Tong University Joint Institute, Shanghai, China. He is under supervision of Prof. Yongxing Shen, studying the asynchronous variational integrators for the phase field approach to dynamic fracture.