Crashworthiness optimization of corrugated sandwich panels
Crashworthiness optimization of corrugated sandwich panels
复制标题
波纹夹芯板的耐撞性优化
DOI：
10.1016/j.matdes.2013.04.086
复制
发表时间：
2013-10-01
影响因子：
8.4
通讯作者：
Li, Qing
中科院分区：
文献类型：
--
作者：
Hou, Shujuan;Zhao, Shuyun;Li, Qing
夹层板作为一类重要的轻质结构构件，在一系列工程应用中得到了广泛的应用。夹层结构的耐撞性在很大程度上与形状和尺寸参数有关，如蜂窝宽度、壁厚、结构角度和芯层高度，这是冲击载荷下的一个关键力学性能。本文以波纹夹层板为例，研究了波纹夹层板在低速局部碰撞和平面碰撞下的结构参数与耐撞性之间的关系，并以耐撞性准则为依据，利用多目标优化技术对结构参数进行了优化。首先对梯形和三角形核心单元的结构进行了优化，使能量吸收达到最大。然后对具有最优梯形芯子形状的夹芯板的壁厚进行了耐撞性优化。最后，在相同的面板厚度和芯层密度下，比较了两种波纹夹层板的耐撞性，发现三角形结构具有更好的耐撞性。(C)2013爱思唯尔有限公司。保留所有权利。
As a class of important lightweight structural components, sandwich panels have gained considerable popularity in a range of engineering applications. The crashworthiness of sandwich structures, which signifies a key mechanical property under impact loading, is found largely related to shape and dimensional parameters, such as cell width, wall thickness, structural angle and core height. This study exemplifies corrugated sandwich panels with trapezoidal and triangular cores to determine the relationship between the structural parameters and the crashworthiness under low-velocity local impact and planar impact, further optimizing these structural parameters with the crashworthiness criteria by using multiobjective optimization techniques. The configurations of trapezoidal and triangular core cells are firstly optimized for maximizing energy absorption. The wall thickness of sandwich panels with optimal trapezoidal core shape is then optimized for crashworthiness. Finally, the crashworthiness of these two types of corrugated sandwich panels is compared with each other under the identical face sheet thickness and core density and it is found that the triangular configuration has better performance. (C) 2013 Elsevier Ltd. All rights reserved.