入水问题中手性材料降载特性的数值模拟  

Numerical Study of Load Shedding Characteristics of Chiral Materials for Water Entry Problem

作　　者：张雪松 颜志淼 王本龙[1] ZHANG Xuesong;YAN Zhimiao;WANG Benlong(School of Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《力学季刊》2024年第3期614-624,共11页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(11772195)。

摘　　要：手性超材料通过其特殊结构的设计,可以实现异于常规材料的独特特性.本文旨在讨论超材料层对于入水冲击载荷的影响.通过非线性本构关系模拟了反四手性蜂窝(Anti-Tetrachiral Honeycomb,ATH)的力学性能,并比较了不同的材料特性本构关系对于入水过程的影响.研究表明,材料的平台应力与致密应变均对入水冲击的载荷有较大影响.当平台应力较高时,材料性质接近于常规材料,且平台应力的降低与致密应变的增加均可延长冲击载荷作用的时间,降低材料所受冲击的峰值.Chiral metamaterials can achieve unique properties different from those of conventional materials through the design of special structures.The aim of this paper is to discuss the effect of the metamaterial layers on the impact loads in water entry problem.The mechanical properties of ATH(Anti-Tetrachiral Honeycomb)were simulated by nonlinear constitutive model.The effects of the constitutive relationship on water entry process were examined.It is shown that both the plateau stress and the densification strain of the material have large influence on the load of water entry impact.When the plateau stress is high,the material properties are close to those of conventional materials.The decrease of the plateau stress and the increase of the densification strain can prolong the duration of impact loading and reduce the peak impact force applied on the material.

关 键 词：入水冲击 手性超材料 流固耦合 非线性本构关系 

分 类 号：O35[理学—流体力学]