闭孔泡沫铝的力学性能和吸能能力  

Mechanical Properties and Energy Absorption Capability of Closed-cell Al Foam

作　　者：王展光[1] 蔡萍[1] 应建中[1] 李书琴[1] 胡景智[1] 

机构地区：[1]井冈山大学建筑工程学院,吉安343009

出　　处：《材料导报》2012年第10期152-155,共4页Materials Reports

基　　金：井冈山大学博士启动项目(JZB11015);江西省科技支撑项目(2010BGA01700)

摘　　要：在闭孔泡沫铝准静态压缩试验的基础上,研究了其力学性能、吸能能力。结果表明,闭孔泡沫铝单轴压缩应力-应变曲线呈现线弹性变形、塑性平台阶段、致密化阶段3个阶段;闭孔泡沫铝的压缩强度、吸能能力随着孔隙率的增大而减小,采用Gibson-Ashby模型分析闭孔泡沫铝的压缩屈服强度,吻合良好。并在此基础上,提出可供工程使用的多孔泡沫金属吸能能力公式,为其工程应用提供理论支持。Based on the compressive test ot closed-cell Al foam, mechanical properties and energy absorption capacity under uniaxial compression were investigated. Compressive stress-strain curve of closed-cell Al foam consists of three distinct regions, the linear elasticity region, the plastic collapse region and the densification region. Compres sive strength and energy absorption capacity of closed-cell A1 foam decreases with the increase of porosity. Compressive yield stress is in good agreement with Gibson-Ashby model＇s expectation. Formula on energy absorption capability of closed-cell Al alloy foam was presented, which could provide theoretical support for its engineering application.

关 键 词：闭孔泡沫铝 压缩力学性能 吸能能力 

分 类 号：TG124.6[金属学及工艺—金属学]