Experimental investigation on the strain-rate effect and inertia effect of closed-cell aluminum foam subjected to dynamic loading
作者： Pengfei Wang , Songlin Xu , Zhibin Li , Jinglei Yang , Chao Zhang
DOI: 10.1016/J.MSEA.2014.10.026
关键词:
摘要: Abstract In this paper, a series of experiments were conducted to clarify the effects strain rate and inertia on deformation behavior closed-cell aluminum foams under impact. The quartz-crystal technique was employed analyze stress uniformity foam samples split Hopkinson pressure bar (SHPB) loading. It revealed that condition is hard reach for thicker sample, strength sensitive rate. Two different direct-impact (DHPB) methods introduced validate three modes, i.e. homogeneous mode, transitional mode shock mode. Results displayed at front surface increased dramatically than back as impact speeds from 16 m/s 113 m/s. axial-inertia effect became more important high speed dynamic processes recorded by Phantom-675 camera analyzed through digital imaging correlation (DIC) method. in presented evolution global distributed failure, but it dominated local failure
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