农业机械学报2012，Vol.43Issue(12)：273-277,5.DOI:10.6041/j.issn.1000-1298.2012.12.049
铝合金6061-T6高速切削物理仿真材料本构模型
Constitutive Model of Physical Simulation in High Speed Cutting for Al6061-T6
摘要
Abstract
The quasi-static and dynamic mechanical properties experiment of Al6061 - T6 in high temperature (20 ~ 500℃ ) and high strain rate (up to 104/s) was carried out on the quasi-static press and split Hopkinson press bar ( SHPB ) equipment. Then the effect curves of strain hardening, strain rate strengthening and thermal softening were obtained. According to these curves, the classic JC ( Johnson-Cook) equation was modified. Furthermore, the modified JC equation was validated in the high speed cutting physical simulation model. The results showed that the Al6061 - T6 flow stress increased with the increasing of strain and strain rate, and obviously decreased with the increasing of deformation temperature. The description accuracy of the modified JC equation was higher than the JC equation. The obtained Al6061 - T6 constitutive equation can provide important material parameters for physical simulation models of its high speed machining process.关键词
分离式Hopkinson压杆技术/应变强化/应变率强化/热软化效应Key words
SHPB / Strain hardening/ Strain rate strengthening/ Thermal softening分类
矿业与冶金引用本文复制引用
徐道春,冯平法,郁鼎文,吴志军..铝合金6061-T6高速切削物理仿真材料本构模型[J].农业机械学报,2012,43(12):273-277,5.基金项目
国家自然科学基金资助项目(50975153)、中央高校基本科研业务费专项资金项目(TD2011-26)和北京林业大学青年教师科研启动基金资助项目(BLX2011018) （50975153）
