Mean in-plane plateau stresses of hexagonal honeycomb cores under impact loadings

被引：47
|
作者：
Sun Deqiang [1 ,2 ]
Zhang Weihong [1 ]
机构：
[1] NW Polytech Univ, Xian 710072, Shaanxi, Peoples R China
[2] Xian Univ Technol, Xian 710048, Shaanxi, Peoples R China
来源：
COMPOSITE STRUCTURES | 2009年 / 91卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Double-walled hexagonal honeycomb cores; In-plane impact properties; Mean in-plane dynamic plateau stress; Mean in-plane quasi-static plateau stress; LINEAR-HARDENING MATERIAL; FINITE-ELEMENT; PART II; STRENGTH;
D O I：
10.1016/j.compstruct.2009.04.045
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Double-walled hexagonal honeycomb cores (DHHCs) are important cushioning materials and their configuration parameters and impact velocities have effects on their impact properties. In this paper, the finite element (FE) model by using ANSYS/LS-DYNA was to investigate the relations between configuration parameters of DHHCs and their mean in-plane plateau stresses at impact velocities from 3 to 250 m/s. When all configuration parameters are kept constant, mean in-plane dynamic plateau stresses are proportional to the square of impact velocities. For the given impact velocity, mean in-plane dynamic plateau stresses are related to the ratios between cell wall thicknesses and cell edge length by power laws, to cell edge length ratios by exponential laws and to expanding angels by conic curves. Based on the FE calculated results, many empirical formulas and a feasible method to be used to calculate mean in-plane dynamic and static plateau stresses of DHHCs are suggested. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：168 / 185
页数：18
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