摘要
The coexistent phenomenon of deformed and transformed adiabatic shear bands(ASBs) of ductile metal was analyzed using the JOHNSON-COOK model and gradient-dependent plasticity(GDP).The effects of melting point,density,heat capacity and work to heat conversion factor were investigated.Higher work to heat conversion factor,lower density,lower heat capacity and higher melting point lead to wider transformed ASB and higher local plastic shear deformation between deformed and transformed ASBs.Higher work to heat conversion factor,lower density,lower heat capacity and lower melting point cause higher local plastic shear deformation in the deformed ASB.Three reasons for the scatter in experimental data on the ASB width were pointed out and the advantages of the work were discussed.If the transformed ASB width is used to back-calculate the internal length parameter in the GDP,undoubtedly,the parameter will be extremely underestimated.
The coexistent phenomenon of deformed and transformed adiabatic shear bands（ASBs） of ductile metal was analyzed using the JOHNSON-COOK model and gradient-dependent plasticity（GDP）. The effects of melting point, density, heat capacity and work to heat conversion factor were investigated. Higher work to heat conversion factor, lower density, lower heat capacity and higher melting point lead to wider transformed ASB and higher local plastic shear deformation between deformed and transformed ASBs. Higher work to heat conversion factor, lower density, lower heat capacity and lower melting point cause higher local plastic shear deformation in the deformed ASB. Three reasons for the scatter in experimental data on the ASB width were pointed out and the advantages of the work were discussed. If the transformed ASB width is used to back-calculate the internal length parameter in the GDP, undoubtedly, the parameter will be extremely underestimated.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2008年第5期1177-1183,共7页
Transactions of Nonferrous Metals Society of China
基金
Project(2004F052) supported by the Educational Department of Liaoning Province, China
关键词
隔热剪切带
韧性金属
变形度
JOHNSON-COOK模式
可塑性
adiabatic shear band
ductile metal
deformation
transformation
JOHNSON-COOK model
gradient-dependent plasticity
