Fabrication and Statics Performance of Pyramidal Lattice Stitched Foam Sandwich Composites  

作　　者：Yun Zhao Shi Yan Jiale Jia 

机构地区：[1]Department of Engineering Mechanics,Harbin University of Science and Technology,Harbin,China

出　　处：《Computer Modeling in Engineering & Sciences》2021年第3期1251-1274,共24页工程与科学中的计算机建模（英文）

基　　金：supported by“National Natural Science Foundation of China”(No.11972140).

摘　　要：In this study,the pyramidal lattice stitched foam sandwich composite materials were manufactured by integrating top and bottom panels with pyramidal lattice core to overcome the weak interface between the core and the skins of the sandwich structure.The influence of the reinforcing core rods on the mechanical properties including compressive,shear,and three-point bending performances of the foam sandwich compositematerialswere revealed through theoretical analysis and comparative experiments.The theoretical predictions were consistent with the experimental results.Compressive test,shear test and three-point bending test were performed.The experimental results show that the core rods can significantly improve the compressive performance and energy absorption efficiency of the pyramidal lattice stitched foam sandwich structure.The effect is related to the diameter of the core rod.The core rod with large diameter has better effect.Compared with the foamsandwich structure,the pyramidal lattice reinforcing foam composites have stronger shear and bending resistance.The failure modes and failure mechanisms of the pyramidal lattice stitched foam sandwich structure under the shear load are given.The failure modes and failure mechanisms of the pyramidal lattice stitched foam sandwich structure under the three-point bending load are also given.The study concludes that compared with the foam sandwich structure,the overall mechanical properties of the lattice stitched foam sandwich structure composites are significantly improved.

关 键 词：Pyramidal lattice compressive performance SHEAR three-point bending failure modes 

分 类 号：TB3[一般工业技术—材料科学与工程]