预制缺陷的K9玻璃层裂特性研究  

SPALLATION CHARACTERISTICS OF K9 GLASS WITH PREFABRICATED DEFECTS

作　　者：胡昌明[1] 王翔[1] 刘仓理[1] 蔡灵仓[1] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室,绵阳621900

出　　处：《力学学报》2011年第6期1125-1132,共8页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金(10802080);中国工程物理研究院科学技术发展基金(2009A0101001;2010B0101002);冲击波物理与爆轰物理国防科技重点实验室(9140C6701010901;9140C6701021102)资助项目~~

摘　　要：层裂问题的核心内容是内部微细观损伤成核及演化规律研究.利用激光内刻方法,在K9玻璃样品内部预制相互贯通的初始损伤,结合火炮加载平板实验和多点DPS测试获得样品自由面粒子速度,以研究材料内部损伤的动态实时演化过程.通过所获得的样品自由面粒子速度图像,分析了层裂振荡周期、未层裂信号和层裂强度等实验现象,为材料的动态损伤演化过程提供了一些新的认识.The kernel issue of spallation is the nucleation and dynamic evolution process of meso-micro damages inside materials. Using laser etching method, some initial inter-connected damages were prefabricated inside K9 glass. Combining with power gun loaded plate tests and multi-point Doppler pin system （DPS） measurements, the free surface velocity profiles of the sample were obtained, and the dynamic real-time evolution of internal damages inside materials was studied. From obtained free surface velocity profiles, some experimental phenomena were analyzed, including spallation oscillation time, unspalled signal, spallation strength, and so on. These results can provide some novel information for dynamic damage evolution process of materials.

关 键 词：K9玻璃 层裂 多普勒探针系统 预制缺陷 

分 类 号：O346.5[理学—固体力学]