Experimental investigation on static compressive behavior and energy-absorption performance of closed cellular Al-Cu alloy
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摘要: 通过静态压缩实验研究一种新型闭孔泡沫铝材料泡沫铝铜合金的静态压缩力学行为和吸能性能。对实验得到的一定密度范围内的材料的弹性模量E和平台应力pl关于相对密度进行曲线拟合，发现将Gibson等给出的开孔泡沫理论公式中的幂次常数修正为由实验确定的常数，可以给出一定密度范围的闭孔泡沫铝铜合金材料的弹性模量和平台应力与相对密度之间关系的一个较好的估计。采用比能-应力或比能-应变曲线，可以对不同密度的泡沫铝铜合金材料的吸能情况进行较为直观的比较和分析。该曲线对工程设计具有较好的指导意义。Abstract: An experimental investigation was carried out to study the static-compressive behavior and energy-absorption performance of a closed cellular Al-Cu alloy. The fitting curves of relative elastic modulus-relative density and relative plateau stress-relative density for a special range of density were built. It was found that good agreement could be achieved if the constants in Gibson's formulas for open cellular materials were revised to the constants determined by experiments. Furthermore, the energy-absorption performances of the closed cellular Al-Cu alloy for a special range of density were analyzed directly by constructing the Se- or Se- diagrams, where Se specific energy is the absorbed energy per unit mass. These diagrams may have good referential values for structural design.
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