氧化铝陶瓷在高压高率条件下动态特性

Dynamic behaviors of alumina ceramic under high pressure and high strain-rate

按照平面冲击波设计原则，设计并完成了氧化铝陶瓷在一维应变条件下冲击压缩实验，通过VISAR测试得到了样品自由面质点速度历程。采用理论方法对陶瓷样品的冲击压力和压力脉冲作用时间进行了预估，实验的冲击压力水平为6.87-7.25GPa，应变率范围为0.43×10^4-2.93×10^4/s。通过对实验结果的判读，获得了材料的Hugoniot弹性极限，分析讨论了高压高率状态下陶瓷的动态强度和破坏特性。

The shock compression experiments were designed and carried out on alumina ceramic under 1D strain and free surface velocity histories of particles were measured by VISAR.The qualifications of planar shock wave were considered in plate impact experiments design.Shock pressure and pressure pulse were calculated by using theoretical methods.The shock pressure levels of plate impact experiments were 6.87-7.25GPa and the strain rates were 0.43×10^4-2.93×10^4/s.With the free surface velocity particle history in alumina ceramics,hugoniot elastic limits were calculated.The dynamic strength and damage behaviors of alumina ceramic under high pressure and high strain rate were discussed.