Performance enhancement of sandwich panels with honeycomb–corrugation hybrid core  

作　　者：Bin Han Wenbin Wang Zhijia Zhang Qiancheng Zhang Feng Jin Tianjian Lu 

机构地区：[1]School of Mechanical Engineering,Xi'anJiaotong University,Xi'an 710049,China [2]MOE Key Laboratory for Multifunctional Materials and Structures,Xi'an Jiaotong University,Xi'an 710049,China [3]State Key Laboratory for Mechanical Structure Strength and Vibration,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《Theoretical & Applied Mechanics Letters》2016年第1期54-59,共6页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11472208);the National 111 Project of China(B06024)

摘　　要：The concept of combining metallic honeycomb with folded thin metallic sheets （corrugation） to construct a novel core type for lightweight sandwich structures is proposed. The honeycomb-corrugation hybrid core is manufactured by filling the interstices of aluminum corrugations with precision-cut trapezoidal aluminum honeycomb blocks, bonded together using epoxy glue. The performance of such hybrid-cored sandwich panels subjected to out-of-plane compression, transverse shear, and three-point bending is investigated, both experimentally and numerically. The strength and energy absorption of the sandwich are dramatically enhanced, compared to those of a sandwich with either empty corrugation or honeycomb core. The enhancement is induced by the beneficial interaction effects of honeycomb blocks and folded panels on improved buckling resistance as well as altered crushing modes at large plastic deformation. The present approach provides an effective method to further improve the mechanical properties of conventional honeycomb-cored sandwich constructions with low relative densities.The concept of combining metallic honeycomb with folded thin metallic sheets （corrugation） to construct a novel core type for lightweight sandwich structures is proposed. The honeycomb-corrugation hybrid core is manufactured by filling the interstices of aluminum corrugations with precision-cut trapezoidal aluminum honeycomb blocks, bonded together using epoxy glue. The performance of such hybrid-cored sandwich panels subjected to out-of-plane compression, transverse shear, and three-point bending is investigated, both experimentally and numerically. The strength and energy absorption of the sandwich are dramatically enhanced, compared to those of a sandwich with either empty corrugation or honeycomb core. The enhancement is induced by the beneficial interaction effects of honeycomb blocks and folded panels on improved buckling resistance as well as altered crushing modes at large plastic deformation. The present approach provides an effective method to further improve the mechanical properties of conventional honeycomb-cored sandwich constructions with low relative densities.

关 键 词：Honeycomb-corrugation Compression Shear Bending Performance enhancement 

分 类 号：TB383.4[一般工业技术—材料科学与工程] TB33