主  办：爆炸科学与技术国家重点实验室

        安全与防护协同创新中心

报告题目：New advances of manufacturing and interface-related topology optimization problems

报告人：亢战  教授

            大连理工大学

时间：2017年4月28日下午14：30

地点：爆炸科学与技术国家重点实验室二层会议室

个人简介：

Dr. Zhan Kang is a Cheung Kong Scholar Chair Professor of Dalian University of Technology. He graduated from Shanghai Jiaotong University in 1992, received his MEng in mechanics from Dalian University of Technology in 1995 and his Dr. –Ing. degree in aerospace and aeronautic engineering from Stuttgart University, Germany in 2005. His current research includes topology optimization, structural optimization under uncertainties, design optimization of smart structures. Dr. Kang has published over 70 research papers in peer-reviewed international journals and one monograph. He has received nearly 2500 citations and has an H-index of 28 (Google Scholar). Dr. Kang has been granted the Outstanding Youth Fund of Natural Science Foundation of China (NSFC). He has been principal investigator of 7 NSFC projects and a Key Project of Chinese National Programs for Fundamental Research and Development (973 Project). He has also conducted many industrial application projects. 

报告摘要 ：

In topology optimization of continuum structures, certain geometrical constraints and interface behaviors, as well as uncertain geometrical manufacturing imperfections, are often of great importance to ensure the manufacturability or integrity of the structures. This talk will present some of our recent developments on the study of manufacturing and interface-related topology optimization problems in the level set function-based framework. The level set, as an implicit geometrical model, offers a natural description of shape and topology evolution. We extend the level set model to geometrical modeling of multi-material and multi-component structures. We propose a unified integral-form constraint to avoid overlaps, to control the distances among the embedded objects. The constraint has an explicit form, facilitating their sensitivity analysis with respect to shape variations, and are applicable to the cases with many embedded components of arbitrary shapes. An integral-form casting constraint is also given to ensure the manufacturability of cast parts in topology optimization. Using the geometrical information extracted from the level set functions, the material interfaces are treated with the cohesive zone model. Thus possible separation of the interfaces can be well captured in the topology optimization. We also propose a level set-based implicit description model for modeling geometrical uncertainties, and material interfaces with certain spatial distribution characteristics. Such a model has been employed in robust topology optimization considering random manufacturing errors. Topology optimization problems for suppressing wrinkles of stretched membranes will also be addressed.

Keywords: topology optimization, multi-material, level set, interface, geometrical uncertainty, robust design