高压物理学报Issue(2)：129-136,8.DOI:10.11858/gywlxb.2014.02.001
AD95陶瓷破坏波问题的实验研究
Experimental Study on the Problem of Failure Wave in AD95 Ceramics
摘要
Abstract
The free surface velocity profile of AD95 ceramic target was measured through laser interfer-ometry under one-dimensional plane strain shock compression.Whether failure wave happened and its relationship with material property were discussed by the analysis of velocity profile characteristic.In an impact stress range from 4.4 to 7.3 GPa (σHEL is about 5.5 GPa),the free surface velocity profile has no appearance of reload signal,which means that there is no appearance of seriously damaged and fragmentized interface as that observed in glass and rock,like a failure wave.The analysis about the free surface velocity profile indicates that the calculated characterizing time difference is regularly less than the experimental value,and the rising foreland has a dispersive property even though the loading stress is less thanσHEL .These findings demonstrate that,to some extent,AD95 ceramics might have produced a certain weak compressive damage at the low-stress region.The fracture toughness is a sig-nificant ingredient that affects the failure wave phenomena.Materials with relatively lower fracture toughness are prone to form microcracks extension,connection and finally lead to the serious breakage and shatter into pieces,which means the appearance of failure wave.关键词
氧化铝/陶瓷/破坏波/压缩损伤Key words
alumina/ceramics/failure wave/compressive damage分类
数理科学引用本文复制引用
孙占峰,贺红亮,李平,李庆忠..AD95陶瓷破坏波问题的实验研究[J].高压物理学报,2014,(2):129-136,8.基金项目
国家自然科学基金重点项目 （）
