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多孔金属夹层板在冲击载荷作用下的动态响应

ISSN号：0459-1879
期刊名称：力学学报
时间：0
页码：100-200
语言：中文
分类：O39[理学—工程力学;理学—力学]
作者机构：[1]西安交通大学航天航空学院,西安710049, [2]西安交通大学强度与振动教育部重点实验室,西安710049
相关基金：国家基础研究计划项目（2006cB601202）,高等学校学科创新引智计划项目（B06024）,国家自然科学基金项目（10328203,10572111,10632060）和国家高技术研究发展计划项目（2006AA032519）资助.
相关项目：超轻多孔金属材料动态力学特性及能量吸收机理的基础研究

关键词：泡沫金属, 夹层板, 冲击载荷, 能量吸收, 有限元模拟, metal foam, sandwich plate, impact loading, energy absorption, finite element simulation

中文摘要：

借助两种有限元软件ABAQUS和LS—DYNA，模拟和分析了两种厚度不同的泡沫铝合金夹层板（三明治板）、方孔蜂窝形夹层板和波纹形夹层板在冲击载荷下的动态响应．4种夹层板的单位面积密度相同，冲击载荷分别用泡沫铝子弹与不锈钢子弹模拟．讨论了泡沫金属夹层板和格构式夹层板在不同冲击载荷作用下的变形机制，重点在于对夹层板的吸能特性及板内各部分吸能变化规律的探讨．研究结果表明：在泡沫子弹冲击下，夹层板主要是通过自身变形来消耗子弹动能，并转化为自身内能．厚度为22mm的泡沫金属夹层板吸收能量最多，底面变形最小，是结构性能最优的夹层板；在刚性子弹高速冲击穿透过程中，格构式夹层板的吸能性能比单位面积密度相同的泡沫金属夹层板的吸能性能更好．波纹形夹层板的能量吸收能力在4种板中最高．

英文摘要：

The steel plate - cellular metallic core sandwich construction is a new type of composite sandwich plate for protective applications. We study in this paper the shock resistance of this sandwich structure under impact loading by using two different finite element codes： ABAQUS and LS_DYNA. The dynamic response of the all-metallic sandwich having three different types of core topology： aluminum foam core, square honeycomb core and corrugated core is simulated and analyzed. The effect of varying core thickness is also investigated. The four kinds of sandwich plates have the same density per unit area. The focus is placed upon on the energy absorption capabilities of different sandwich plates having the same density per unit area. Results of the study indicate that sandwich plate with 22 mm aluminum foam core is an excellent sandwich structure with strongest energy absorption capability and smallest deflection in all-metallic sandwich plates by loading the plates with metal foam projectiles. Further, it is found that the sandwich plates with lattice cores have a higher shock resistance than sandwich plates with metallic foam cores of equal mass under penetration impact of rigid bullet.

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