摘要
运用材料试验机和分离式霍普金森压杆装置（SHPB）对3种不同加工及热处理状态的5A06铝合金在常温～500℃、应变率为10^-4～10^3s^-1下的力学行为进行了实验研究。基于Johnson-Cook（JC）本构模型，通过实验数据拟合得到了每种状态下材料的本构模型参量。对Johnson-Cook本构模型中的应变率强化项作了修正，修正后的Johnson-Cook本构模型与实验数据基本吻合，从而确立了3种状态下5A06铝合金的动态本构关系。
Dynamic mechanical behaviors of 5A06 Al alloy by three kinds of processes and heat treatments were studied with the split Hopkinson pressure bar （SHPB） and static material test system over a wide range of strain rates and temperature. The Johnson-Cook constitutive relationship parameters were determined through these experiments. The strain-rate hardening term in the Johnson-Cook constitutive model was modified. The modified Johnson-Cook constitutive model is in agreement with the experimental data for 5A06 Al alloy.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2009年第3期306-311,共6页
Explosion and Shock Waves
基金
国家空间碎片专题研究基金项目(kjsp06211)
