焦散线法对岩石类介质的适用性研究
首发时间:2009-08-11
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、外研究的热点难点问题之一。本文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,选用的三类岩石材料均未发现焦散斑。从实验和理论估算角度,指出了岩石类材料难以拍摄到、甚至不出现焦散斑的原因。
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Applicability Study on Caustics Method used in Rock-like Materials
Abstract:Due to the heterogeneous and non-continuous structure in rock-like materials, dynamic fracture mechanisms and properties are difficult to obtain for both home and abroad researchers. In this paper, the applicability on caustics method used in rock-like materials was studied, in order to find some information in rock specimen crack tip zone. There were no caustics obtained in any one of all the three kinds of selected rock. From the testing results, the author pointed out the reason for the less probability in capturing, or even the absence of caustics in rock-like materials, that is the micro-cracks in the crack tip zone in rock depress the intensity of the stress concentration.
Keywords: rock dynamic fracture caustics method
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No.3440948777912499****
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