Theoretical and Experimental Analysis of Nonlinear Large Tensile Deformation of Superelastic SMA-Based Honeycomb Structures  

作　　者：Yahao Wang Wenjiong Chen Renjing Gao Shutian Liu 

机构地区：[1]State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian,116024,China

出　　处：《Acta Mechanica Solida Sinica》2025年第1期45-64,共20页固体力学学报(英文版)

基　　金：supported by the National Key Research and Development Program of China(No.2020YFB1708303);the National Natural Science Foundation of China(Nos.U1808215 and 12072058);the Fundamental Research Funds for the Central Universities of China(DUT20LK02).

摘　　要：Honeycomb structures of shape memory alloy(SMA)have become one of the most promising materials for flexible skins of morphing aircraft due to their excellent mechanical properties.However,due to the nonlinear material and geometric large deformation,the SMA honeycomb exhibits significant and complex nonlinearity in the skin and there is a lack of relevant previous research.In this paper,the nonlinear properties of the SMA honeycomb structure with arbitrary geometry are investigated for the first time for large deformation flexible skin applications by theoretical and experimental analysis.Firstly,a novel theoretical model of SMA honeycomb structure considering both material and geometric nonlinearity is proposed,and the corresponding calculation method of nonlinear governing equations is given based upon the shooting method and Runge–Kutta method.Then,the tensile behaviors of four kinds of SMA honeycomb structures,i.e.,U-type,V-type,cosine-type,and trapezoid-type,are analyzed and predicted by the proposed theoretical model and compared with the finite element analysis(FEA)results.Moreover,the tensile experiments were carried out by stretching U-type and V-type honeycomb structures to a global strain of 60%and 40%,respectively,to perform large deformation analysis and verify the theoretical model.Finally,experimental verification and finite element validation show that the curves of the theoretical model results,experimental results,and simulation results are in good agreement,illustrating the generalizability and accuracy of the proposed theoretical model.The theoretical model and experimental investigations in this paper are considered to provide an effective foundation for analyzing and predicting the mechanical behavior of SMA honeycomb flexible skins with large extensional deformations.

关 键 词：Morphing wing Flexible skin Large deformation Geometric nonlinearity Material nonlinearity Shape memory alloy 

分 类 号：V214.8[航空宇航科学与技术—航空宇航推进理论与工程]