摘要
通过LS-DYNA模拟分析泡沫铝填充多棱管的准静态过程。以柱壳比(R)作为比较具有不同截面形状的泡沫铝填多棱管的依据。通过比吸能、比力和能量吸收率,实现泡沫铝填充多棱管吸能性能的定量化比较分析。研究发现在具有相同柱壳比的条件下,泡沫铝填充四棱管的比吸能最高;泡沫铝填充八棱管的能量吸收率最高(约78%);四棱管的吸能量占泡沫铝填充四棱管总吸能量的比例最小(约57%)。不同的几何形状和结构对泡沫铝填充多棱管的吸能性能有着显著的影响。同时,对泡沫铝填充多棱管的变形模式和内在机制也做了初步的分析。
The behaviours of foamed aluminum-filled prisms were studied under quasi-static loading conditions by LS-DYNA.Column shell ratio（R） was taken as the basic parameter used to classify foamed aluminum-filled prisms with different forms of cross sections.Specific energy absorption,specific force and energy absorption rate were adopted as criterious to analyse the energy absorption quantitatively.With the same column shell ratio,specific energy absorption of foamed aluminum-filled square prism is the highest;energy absorption rate of octagonal prism is the highest（78%）;the proportion of energy absorption of square pipe to total energy absorption of square prism is the least（57%）.Different shape and construction have great influence on energy absorption of foamed aluminum-filled prisms.Meanwhile,the deformation pattern and inherent mechanism of foamed aluminum-filled prisms were analysed.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第9期237-242,247,共7页
Journal of Vibration and Shock
基金
广西科学基金资助项目(桂科自0991064)
关键词
泡沫铝
柱壳比
吸能
数值模拟
foamed aluminum
column shell ratio
energy absorption
numerical simulation
