焦散线法对岩石类介质的适用性研究  

Study on the Applicability of Caustics to Rock Type Media

作　　者：刘彩平[1] 段庆全[2] 

机构地区：[1]北京科技大学 [2]中国石油大学(北京)

出　　处：《金属矿山》2009年第7期143-146,共4页Metal Mine

基　　金：教育部博士点新教师基金项目(编号:20070008014)

摘　　要：岩石具有非均质性、不连续性,其动态断裂性能研究是国内、外研究的热点难点问题之一。对焦散线法在岩石类介质的适用性进行研究,期望获得裂纹尖端周围焦散斑的大致情况。研究结果表明,选用的3类岩石材料均未发现焦散斑。从试验和理论估算角度,指出了岩石类材料难以拍摄到、甚至不出现焦散斑的原因。Rock has heterogeneity and discontinuity and rock~ dynamic fracture property has been one of the hotspets and challenges in domestic and foreign studies. The paper studies the applicability of caustics to rock type media, hoping to have a general view of the caustics speckles surrounding the crack tip. The results show that no caustic speckles is found in three types of rock materials. The causes for being hard to shoot or even finding no caustics speckles in rock type materials are pointed out from viewpoints of experiment and theoretical estimation.

关 键 词：岩石 动态断裂 焦散线法 

分 类 号：O346.1[理学—固体力学] TU45[理学—力学]