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《Explosion and Shock Waves》 2015-04
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Deformation and stress nonuniformity of aluminum foam under different impact speeds

Zhang Chao;Xu Song-lin;Wang Peng-fei;Zhang Lei;CAS Key Laboratory for Mechanical Behavior and Design of Materials,University of Science and Technology of China;  
A split Hopkinson pressure bar apparatus(SHPB)and a modified SHPB apparatus were employed to investigate the dynamic responses of aluminum foam.During the experiments,a highspeed camera was used to record the deformation process of specimens.Three deformation patterns were observed with the increase of the impact speed.All photographs recorded were analyzed by the digital imaging correlation method.The analytical results were used to illustrate the strain field progressing and the stress nonuniformity of these three deformation patterns.And they are helpful in the revealing of the intrinsic mechanisms of these three deformation patterns.This method offers a new and reliable method to study the influence of deformation nonuniformity on dynamic mechanical behaviors of aluminum foam under different impact speeds.
【Fund】: 国家自然科学基金项目(11272304 11472264);; 高等学校博士学科点专项科研基金项目(20113402110008)
【CateGory Index】: O347.3
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