Multiscale Topology Optimization Design and Additive Manufacturing of Thermal Expander Metadevices  

作　　者：Wei Sha Mi Xiao Yihui Wang Mingzhe Huang Liang Gao 

机构地区：[1]State Key Laboratory of Intelligent Manufacturing Equipment and Technology,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Additive Manufacturing Frontiers》2024年第3期3-10,共8页增材制造前沿(英文)

基　　金：supported by National Natural Science Foundation of China(Grant No.52305259);National Postdoctoral Program for In-novative Talents of China(Grant No.BX20230135);China Postdoctoral Science Foundation(Grant No.2023M741261);the New Cornerstone Science Foundation through the XPLORER PRIZE;the Young Top-notch Talent Cultivation Program of Hubei Province;the Knowledge Innova-tion Program of Wuhan-Shuguang;the Fundamental Research Funds for the Central Universities(Grant No.HUST:2024BRB005);the Taihu Lake Innovation Fund for Future Technology(Grant No.HUST:2023-B-7).

摘　　要：Thermal expander metadevices can yield a large uniform temperature field powered by a linear heat source.Previous design of thermal expander metadevices can be regarded as a combination of achieved thermal cloaks and their background materials.However,these thermal-cloak-inspired expander metadevices have an inherent flaw,i.e.,their thermal functionality will be lost when the background material is changed,thus limiting their practical applications.To solve this problem,the multiscale topology optimization(MTO)method is employed to design thermal expander metadevices that can maintain their expander functionality under different background materials.In MTO,transformation thermotic technology is used to determine the anisotropic thermal conductiv-ities inside a thermal expander metadevice and topology optimization is performed to generate the topological configuration of each microstructure with the target effective thermal conductivity.Subsequently,the thermal functionalities of thermal double and triple expander metadevices with different background materials are nu-merically verified via simulations.Finally,the thermal double expander metadevice is fabricated via additive manufacturing and experimentally tested for its thermal functionality.The findings of this study address the challenge of designing thermal expander metadevices with background material-independent functionality.

关 键 词：Thermal expander metadevice Background material Multiscale topology optimization Regionalization transformation 

分 类 号：TH8[机械工程—仪器科学与技术]