摘要
本文主要利用分离式霍布金森压杆 (SHPB)对泡沫铝进行了三种应变率 (0 6× 10 3 s、1 0× 10 3 s和 1 9× 10 3 s)动态压缩实验。实验结果表明 :泡沫铝的动态应力 应变曲线也具有泡沫材料的动态应力 应变曲线的“三阶段”特征 ,并且应变率对其影响明显 ,流动应力随着应变率的增加而增加 。
The dynamic response of closed cell foamed aluminum under compression by Split Hopkinson Pressure Bar was observed,and the high strain rates of 6 0×10 2/s、1 0×10 3/s、1 9×10 3/s were obtained respectively.The shapes of three compression strain stress curves are similar to that of the Righd Polyure thane Foam characterized by three distinct region:an elastic regions,a collapse region and a densification region.The experimental results show that the yield stress enhances with the increasing of strain rate.It was found that the dynamic behavior of the foamed aluminum demonstrated mainly foam's structural properties rather than matrix's properties.
出处
《材料科学与工程》
CSCD
北大核心
2002年第3期341-343,共3页
Materials Science and Engineering
基金
国家基金委和中物院联合基金资助项目 ( 10 0 760 2 0 )
