强冲击加载下铅样品表面微层裂现象诊断  

Experimental diagnostic of micro-spall fragments on Pb surface under intense shock

作　　者：陈永涛[1] 胡海波[1] 汤铁钢[1] 李庆忠[1] 王荣波[1] 王德田[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,绵阳621900

出　　处：《中国科学：物理学、力学、天文学》2012年第10期1076-1085,共10页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:10902102);中国工程物理研究院重点基金(编号:2010A0201008);双百人才基金(编号:2009R0101)资助项目

摘　　要：针对强冲击加载下样品表面与熔化相关的微层裂现象,本文发展了Asay-F-window技术,结合压电石英计和高速摄影等传统微喷测试技术,首次从实验上给出了熔化状态下Pb样品表面微层裂物质层质量、密度、速度和空间分布等信息,并近似给出了某特定时刻传统高速微喷物质与微层裂物质的整体空间分布图像,为熔化状态下材料微喷模型的构建提供了重要数据.We conducted experiments to study the Micro-spall from explosively shocked melting Pb targets. In the experiments, we diagnosed dynamic properties of ejecta through use of high speed photography, piezoelectric pins, Asay-F- window, and Doppler pin system. From Asay-Window and Thick witness plate techniques, Asay-F-window was designed, which is suitable to investigate high density micro-spall fragments. The areal mass, volume density and velocity of micro-spall fragments from the Pb target were first presented. The static distribution of ejecta including micro-jetting particles and micro-spall fragments at a single moment in time was also obtained. The results make great progress in the construction of dynamic model of ejecta.

关 键 词：PB 微喷 微层裂 冲击熔化 

分 类 号：O346.1[理学—固体力学]