球形孔泡沫纯铝准静态压缩性能

在球形孔泡沫纯铝压缩应力应变曲线基础上,研究了压缩强度、吸能能力,结果表明:球形孔泡沫纯铝与球形孔泡沫铝合金的压缩应力应变曲线相似,分为三个部分:线弹性阶段、平台阶段和密实阶段;球形孔泡沫纯铝相对于球形孔泡沫铝合金是一种吸能能力更强的、韧性性能良好的新材料。采用Gibson-Ashby的模型来分析球形孔泡沫纯铝的压缩屈服强度,吻合良好。

Quasi-static compressive property of spherical pores Al foam

Based on compression curves of spherical pores Al foam, compressive yield strength and energy absorption had been investigated. The compressive stress-strain curve of cellular Al alloy is almost the same with that of spherical pores Al foam, which consists of three distinct regions, i.e., the linear elasticity region, the plastic collapse region or brittle crushing region, and the densification region. Spherical pores Al foam is a cellular metal material of high plastic performance, so energy absorption capability of it is bigger than that of spherical pores Al alloy foam. Compressive yield stress was in good agreement with Gibson- Ashby model’s expectation.