| 岩石声发射参数与断裂力学参量的关系研究 |
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| 引用本文： | 秦四清,李造鼎. 岩石声发射参数与断裂力学参量的关系研究[J]. 东北大学学报(自然科学版), 1991, 0(5) |
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| 作者姓名： | 秦四清 李造鼎 |
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| 作者单位： | 东北工学院采矿系(秦四清)，东北工学院采矿系(李造鼎) |
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| 摘 要： | 依据声发射测试原理及断裂力学基本理论,导出了低脆性岩石声发射总数N与应力强度因子K_I关系的一般表达式。分析表明:N并非与K_I~n成简单的比例关系,但如果K_I取值范围满足2K_(I0)≤K_I≤8K_(I0)
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| 关 键 词： | 岩石 声发射 应力强度因子 塑性变形 裂纹扩展 |
On the Relationship between Rock Acoustic Emission Parameters and Fracture Mechanics Parameters |
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| Qin Siqing,Li Zaoding. On the Relationship between Rock Acoustic Emission Parameters and Fracture Mechanics Parameters[J]. Journal of Northeastern University(Natural Science), 1991, 0(5) |
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| Authors: | Qin Siqing Li Zaoding |
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| Abstract: | A general expression of the total counts of acoustic emission N relating to the stress intensity factor K1 is derived for low-brittle rock,based on the testing principle of acoustic emission and the basic theory of fracture mechanics. It is shown that there is not an absolute proportion between N and K1n,but N will be approximately proportional to KIn if the value of KI is taken satisfying the range:2K10<.KI<8K10>Ic.This argument has been verified by the data-processing result of acoustic emission experiments conducted for marble.A function of acoustic emission rate in relation to stress intensity fator and that of crack length increment to crack propagation rate are thus developed for crack propagation.A conclusion that the acoustic emission rate depends mainly on the crack propagation rate is also verified by experiments . |
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| Keywords: | rock acoustic emission stress intensity factor plastic deformation crack propagation. |
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