V型折叠式夹层板横向压皱吸能特性研究

金属夹层板具有优越的力学性能，良好的吸能特性可用于船舶耐撞、抗爆防护结构设计。以V型折叠式夹芯结构为研究对象，通过试验分析夹芯层结构变形模式、压皱力历程曲线等，得到了夹芯层结构横向压皱力学性能，采用有限元软件Abaqus对其在横向受压时的力学行为进行数值仿真分析，分析结构压皱动态渐进屈曲过程、变形模式、吸能效率、平均压皱强度等。对比分析表明，V型夹芯层结构在横向压皱载荷下发生屈曲、褶皱变形模式，变形模式决定了压皱力学行为及其性能，其中单元变形模式I的吸能效率较高。采用合理的模型化技术得到的有限元计算结果与试验结果两者吻合较好，验证了有限元数值仿真的计算精度。

Energy Absorption of V-type Corrugated Cores Sandwich Panels under Lateral Crushing

The metal corrugated core sandwich panels with superior mechanical performance can be used as crashworthiness and protective structures. Take the V-type corrugated core sandwich panel for example; Analysis of the deformation mode and curves of crushing force versus displacement are made by quasi-static crushing experiment. At the same time, the lateral crushing mechanical behavior and performance of energy absorption is taken with the finite element software Abaqus. The parameters of crushing force, deformation mode, energy absorption and mean crushing strength are compared. The results show that the crushing performance obtained from the experiment is consistent with that from numerical simulation. The deformation mode of the sandwich core structures has great effect on the crushing performance. The specific energy and mean crushing strength of mode I is better than that of mode II.