摘要
为比较几种正多边形金属点阵格栅三明治结构在低速冲击下动态响应的差异,分析影响三明治结构性能的因素,建立金属点阵格栅三明治板在低速冲击下的有限元模型并计算其力学响应。研究结果表明：表观密度相同的情况下,增加三明治板芯层格栅单元边数,能增强面板与芯层所形成的周边连带效应,提高板的抗冲击性能及整体刚度;低速点冲击荷载作用下,三明治板上下面板厚度比在1~2之间是比较合适的,过大或过小会导致材料利用不足或影响结构安全等问题;在保证足够结构刚度的前提下,应尽可能减小芯层壁厚及高度以提高结构吸能效率。
In order to compare the difference of the dynamic response of several polygonal metal lattice sandwich structures under low velocity impact and analyse the factors that affect the performance of sandwich structure,the finite element model of metal lattice sandwich plate under low velocity impact was established and the mechanical response of metal lattice sandwich plate was calculated. The results show that increasing the number of edge of lattice unit can enhance the joint effect formed by the panels and the core layer,improve the impact resistance and overall stiffness of the sandwich structure with the same apparent density. The thickness ratio of the upper and lower panels of sandwich plate is more appropriate between one to two under low velocity impact,too large or too small may lead to low utilization of material or affect structure safety. On the premise of ensuring enough rigidity of structure,the thickness and height of the core wall should be reduced as far as possible to improve the energy absorption efficiency of the structure.
作者
杨辉
尹冠生
李轩
侯秀慧
YANG Hui;YIN Guan-sheng;LI Xuan;HOU Xiu-hui(College of Science,Chang＇an University,Xi＇an 710064,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2018年第4期245-253,共9页
Journal of Plasticity Engineering
基金
国家自然科学基金青年科学基金资助项目(11402035)
教育部博士点基金资助项目(博导类)(20130205110014)
作者简介
第一作者：杨辉，男，1992年生，硕士研究生，主要从事结构防撞和吸能研究，E-mail：496612359@qq．com;通讯作者：尹冠生，男，1958年生，博士，教授，博士生导师，主要从事混凝土细观力学研究，E-mail：yings@chd．edu．cn
