Strain rate sensitivity of closed cell aluminium fly ash foam  

闭孔粉煤灰泡沫铝的应变速率敏感性(英文)

作　　者：Manmohan DASS GOEL VASANT A.MATSAGAR Anil K.GUPTA Steffen MARBURG 

机构地区：[1]CSIR-Advanced Materials and Processes Research Institute(AMPRI),Council of Scientific and Industrial Research(CSIR),Bhopal-462064,India [2]Department of Civil Engineering,Indian Institute of Technology(IIT) Delhi,New Delhi-110016,India [3]Department of Aerospace Engineering,University of German Armed Forces,Neubiberg-85577,Munich,Germany

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第4期1080-1089,共10页中国有色金属学报（英文版）

摘　　要：With the increasing use of metal foams in various engineering applications, investigation of their dynamic behaviour under varying strain rate is necessary. Closed cell aluminium fly ash foam developed through liquid metallurgy route was investigated for its stress--strain behaviour at different strain rates ranging from 700 s^-1 to 1950 s^-1. The numerical model of split Hopkinson pressure bar （SHPB） was simulated using commercially available finite element code Abaqus/Explicit. Validation of numerical simulation was carried out using available experimental and numerical results. Full scale stress--strain curves wez＇e developed for various strain rates to study the effect of strain rate on compressive strength and energy absorption. The results showed that the closed cell aluminium fly ash foam is sensitive to strain rate.随着金属泡沫在工程应用中的增加,对它们在不同应变速率下的动态行为进行研究是有必要的。采用熔体发泡法制备闭孔粉煤灰泡沫铝,并对其在应变速率从700 s^(-1)增加到1950 s^(-1)时的应力—应变行为进行研究。使用商用有限元软件Abaqus/Explicit对分离式霍普金森压杆(SHPB)的数学模型进行模拟。实验和模拟结果证实了数学模型是可用的。研究了应变速率对抗压强度和能量吸收的影响,得到了多种应变率下的应力—应变曲线。结果表明,闭孔粉煤灰泡沫铝对应变速率是敏感的。

关 键 词：high strain rate metal foam strain rate sensitivity numerical simulation split Hopkinson pressure bar 

分 类 号：TF821[冶金工程—有色金属冶金]