摘要
针对多孔材料在高速冲击下的孔隙闭合特征推导出计入熔化效应的反映孔隙塌缩的p-α(压力-孔隙度)关系式;从密实体的冲击绝热方程出发,利用密实体的冲击雨贡尼奥(Hugoniot)数据沿等压线推广得到了多孔体的冲击状态方程.利用计入熔化效应的p-α关系式和等压推广的多孔材料冲击状态方程计算了多孔铁粉的p-v(压力-比容)和D-u(冲击波速-质点运动速度)关系,计算结果同冲击压缩实验数据符合良好,除个别实验点外,相对误差均小于4%,证实该方程有较好的计算精度.
A new pressure-porosity (p-α) relation which reflects the close holes is obtained considering the melting effect according to the closing character of the holes in porous materials under high-velocity impaction. Then the shock-state equation of the porous materials is obtained by generalizing the Hugoniot data of corresponding dense materials along equal-pressure lines. The relation between pressure and specific volume as well as that of the velocities of shock waves and particles are calculated recurring to the p-α relation and the equation of state of the porous materials. The results show that they are well in accord with the experimental data. The relative error is less than 4% except for separate experimental data. It's proved that the equation has a better accuracy.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2005年第3期316-319,共4页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(10172025).
