Strength optimization of ultralight corrugated-channel-core sandwich panels

作     者：ZHAO ZhenYu LI Lang WANG Xin ZHANG QianCheng HAN Bin LU TianJian 

作者机构：State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an 710049 China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Nanjing Center for Multifunctional Lightweight Materials and Structures (MLMS) Nanjing University of Aeronautics and Astronautics Nanjing 210016 China School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2019年第62卷第8期

页      面：1467-1477页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11472209, 11472208) the China Postdoctoral Science Foundation (Grant No. 2016M600782) the Postdoctoral Scientific Research Project of Shaanxi Province (Grant No. 2016BSHYDZZ18) the Fundamental Research Funds for Xi’an Jiaotong University (Grant No. xjj2015102) the Jiangsu Province Key Laboratory of High-end Structural Materials (Grant No. hsm1305) 

主　　题：sandwich panel corrugated channel generalized bending optimization 

摘      要：Novel ultralight sandwich panels, which are comprised of corrugated channel cores and are faced with two identical solid sheets,subjected to generalized bending are optimally designed for minimum mass. A combined analytical and numerical(finite element) investigation is carried out. Relevant failure mechanisms such as face yielding, face buckling, core yielding and core buckling are identified, the load for each failure mode derived, and the corresponding failure mechanism maps constructed. The analytically predicted failure loads and failure modes are validated against direct finite element simulations, with good agreement achieved. The optimized corrugated channel core is compared with competing topologies for sandwich construction including corrugations, honeycombs and lattice trusses, and the superiority of the proposed structure is demonstrated. Corrugated-channel-core sandwich panels hold great potential for multifunctional applications, i.e., simultaneous load bearing and active cooling.