摘要
通过LS-DYNA模拟分析了梯度泡沫铝的碰撞性能。在高速碰撞下,相对密度为0.18的均质泡沫铝的防护效果好于梯度泡沫铝。但是,梯度泡沫铝的加速度时程曲线的线型可根据实际的需要设计。有效载荷的最大加速度、加速度时程曲线的形状与梯度泡沫铝的密度梯度有关。小梯度的\型梯度泡沫铝是最好的吸能器。同时对梯度泡沫铝的作用机制进行了分析。
The impacting behaviors of graded aluminium foam were studied by LS - DYNA. The shielding effect of uniform aluminium foam （ relative densi- ty 0. 18 ） was superior to graded aluminium foam under the action of high impulsive load. However, the acceleration - time curve shape of graded aluminium foam could be designed based on reality requirement. The most acceleration and acceleration - time curve shape of actual load were relative to aluminium foam＇ density gradient. Little density gradient aluminium foam （ ／ ） was the best energy absorption instrument. Meanwhile, the work mechanism of graded aluminium foam was analyzed.
出处
《轻金属》
CSCD
北大核心
2012年第3期54-59,共6页
Light Metals
基金
广西科学基金资助项目:桂科自0991064
国家自然科学基金项目(11162001)
广西教育厅项目(201106LX386)
关键词
梯度泡沫铝
吸能
数值模拟
应力波
graded aluminium foam
energy absorption
numerical simulation
stress wave
