Multiresolution and multimaterial topology optimization of fail-safe structures under B-spline spaces  

作　　者：Yingjun WANG Zhenbiao GUO Jianghong YANG Xinqing LI 

机构地区：[1]National Engineering Research Center of Novel Equipment for Polymer Processing,South China University of Technology,Guangzhou 510641,China [2]The Key Laboratory of Polymer Processing Engineering of the Ministry of Education,South China University of Technology,Guangzhou 510641,China [3]Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing,South China University of Technology,Guangzhou 510641,China [4]State Key Laboratory of Digital Manufacturing Equipment and Technology,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Frontiers of Mechanical Engineering》2023年第4期149-163,共15页机械工程前沿（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.52075184);the Open-funding Project of State Key Laboratory of Digital Manufacturing Equipment and Technology(Huazhong University of Science and Technology),China(Grant No.DMETKF2021020).

摘　　要：This study proposes a B-spline-based multiresolution and multimaterial topology optimization(TO)design method for fail-safe structures(FSSs),aiming to achieve efficient and lightweight structural design while ensuring safety and facilitating the postprocessing of topological structures.The approach involves constructing a multimaterial interpolation model based on an ordered solid isotropic material with penalization(ordered-SIMP)that incorporates failsafe considerations.To reduce the computational burden of finite element analysis,we adopt a much coarser analysis mesh and finer density mesh to discretize the design domain,in which the density field is described by the B-spline function.The B-spline can efficiently and accurately convert optimized FSSs into computer-aided design models.The 2D and 3D numerical examples demonstrate the significantly enhanced computational efficiency of the proposed method compared with the traditional SIMP approach,and the multimaterial TO provides a superior structural design scheme for FSSs.Furthermore,the postprocessing procedures are significantly streamlined.

关 键 词：MULTIRESOLUTION multimaterial topology optimization fail-safe structure B-SPLINE 

分 类 号：O189[理学—数学]