Dynamic compressive behavior and constitutive relations of lanthanum metal  

作　　者：王焕然 蔡灿元 陈大年 马东方 邓高涛 

机构地区：[1]Mechanics and Materials Science Research Center,Ningbo University

出　　处：《Journal of Rare Earths》2012年第5期473-479,共7页稀土学报（英文版）

基　　金：supported by National Natural Science Foundation of China (10872100,11072118);Natural Science Foundation of Zhejiang(Y12A020008)

摘　　要：The dynamic compressive behavior and constitutive relations of Lanthanum（La） metal was determined by using the first compression in split Hopkinson pressure bar（SHPB） tests at different strain rates and temperatures.The constitutive relation of La metal determined in a certain range of strains was employed and adjusted in numerically simulating large deformations of La metal specimens generated by multi-compression in SHPB tests and recorded by a high-speed camera.The dynamic compressive behavior and constitutive relations of La metal under multiple SHPB tests loading was also revealed.The results of scanning electron microscope（SEM） investigation of the recovered La metal specimens for typical tests showed that there was a variety of deformation microstructures depending on strain rate,temperature and stress state.The dynamic compressive behavior and constitutive relations of Lanthanum（La） metal was determined by using the first compression in split Hopkinson pressure bar（SHPB） tests at different strain rates and temperatures.The constitutive relation of La metal determined in a certain range of strains was employed and adjusted in numerically simulating large deformations of La metal specimens generated by multi-compression in SHPB tests and recorded by a high-speed camera.The dynamic compressive behavior and constitutive relations of La metal under multiple SHPB tests loading was also revealed.The results of scanning electron microscope（SEM） investigation of the recovered La metal specimens for typical tests showed that there was a variety of deformation microstructures depending on strain rate,temperature and stress state.

关 键 词：lanthanum metal dynamic compression constitutive relation multi-compression multiple impact SHPB rare earths 

分 类 号：O614.331[理学—无机化学]