DEFORMATION CHARACTERISTIC OF METAL FOAM UNDER DIFFERENT STRAIN RATE AND TEMPERATURE

摘要：

The non-uniformity of metal foam structure affect the deformation models significantly.Different sizes of metal foam have effect the mechanical properties of materials,each microscopic structure deformation models corresponds to different macro impact energyabsorption ability of metal foam.Compressive deformation behavior of a closed-cell Aluminum foam was assessed under different strain rate (0.001/s to 2000/s) and temperature(-100°C to 500 °C).High strain rate experimental have proceeded by using the Split Hopkinson Pressure Bar (SHPB),and the Quasi-static tests have conducted on the Material testing machine.Through the experiment data analyzed the influence of thermal-mechanics coupling.Its found that with the increase of the strain rate,the collapse stress and plateau stress increased.With the increase of the temperature,the plateau stress decreased.And with the increasing of the specimen size,the platform of the stress-strain curve are linearly reduced,the reason of this phenomenon are mainly influenced by the inhomogeneous of metal foam.

关键词： metal foam strain rate temperature size effect

作者: P.F.Wang S.L.Xu S.S.Hu

作者单位: Key Laboratory Mechanical Behavior and Design of Materials,University of Science and Technology of China,Hefei,Anhui 230026,China

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 667-670

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）