摘要
应用57 mm压剪炮和双磁场IMPS粒子测试系统对95%的Al2O3陶瓷材料在压剪联合加载条件下的力学行为进行了实验研究,测量得到了材料内部压缩波(P波)、剪切波(S波)的加载、卸载和传播规律。对剪切波的衰减随载荷的变化进行了研究,初步得到95%Al2O3陶瓷材料在压剪联合载荷冲击下发生损伤的纵向应力阀值是4.86 GPa。
The pressure-shear plate impact experiments have been pertormed on 95% Al2O3 ceramic using 57 mm diameter compressed gas gun. The high-pressure gases drove the ceramic flyer to impact the oblique target to produce pressure-shear loading, and the particle velocity is traced by embedded electromagnetic velocity gauge. The inelastic behavior and shear wave propagation of ceramics under combined compression and shear loading have been probed in ceramic. The lateral particle velocities show an attenuation of shear waves with increasing of impact load. From the experiments, we found that when the compression stress reached about 4.86 GPa, 95% Al2O3 ceramic started to produce little amount of cracks and holes. The shear waves also began to attenuate.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2007年第4期337-341,共5页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(10472014)
关键词
固体力学
电磁粒子速度计
陶瓷
压缩波
剪切波
衰减
solid dynamics
electromagnetic velocity gauge
ceramic
compress wave
shear wave,attenuation
