Dynamic compressive constitutive relation and shearing instability of metallic neodymium

作者：Wang Huanran; Cai Canyuan; Chen Danian^*; Ma Dongfang; Hou Yanjun; Wu Shanxing

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2011, 528(22-23): 6838-6843.

DOI：10.1016/j.msea.2011.05.066

• Metallic Nd
• Dynamic compression
• Constitutive relation
• Large deformation
• Shearing instability

Based on static tests on MTS and dynamic tests on split Hopkinson pressure bar (SHPB) during the first loading, this study determined the dynamic compressive constitutive relation of metallic Nd. Based on large deformations of metallic Nd specimens generated by the multi-compressive loadings during SHPB tests, and recorded by a high-speed camera, the results of numerical simulations for SHPB test processes were used to extend the determined constitutive relation from small strain to large strain. The shearing instability strain in dynamic compressive deformations of metallic Nd was estimated with the extended constitutive relation according to the criterion given by Batra and Wei, and was compared with the average strain of recovered specimens.

• 出版日期2011-8-25
• 单位宁波大学