| 不同受力状态裂纹表面电位对比分析 |
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| 引用本文： | 刘大庆,刘贞堂,李忠辉,张勇,刘杰,胡少斌. 不同受力状态裂纹表面电位对比分析[J]. 煤矿安全, 2012, 43(2): 163-166 |
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| 作者姓名： | 刘大庆 刘贞堂 李忠辉 张勇 刘杰 胡少斌 |
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| 作者单位： | 中国矿业大学安全工程学院,江苏徐州,221116 |
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| 摘 要： | 对含45°预制裂纹的花岗岩板进行单轴压缩实验,对比分析翼形裂纹和二次裂纹的表面电位,从而分析研究不同受力状态裂纹开裂扩展过程中表面电位的差异性。研究结果表明:当压剪作用产生的二次裂纹呈现为1条破碎带时,压剪作用产生的二次裂纹的表面电位比张拉应力产生的翼形裂纹的表面电位更加复杂;当压剪作用产生的二次裂纹也呈现为单一裂纹时,2种受力状态产生的裂纹的表面电位在变化趋势上没有明显的差异性;裂纹开裂扩展过程中表面电位的复杂程度与裂纹产生时的受力状态没有直接关系,而是与裂纹形态有直接关系。
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| 关 键 词： | 预制裂纹 裂纹扩展 受力状态 裂纹形态 表面电位 |
Comparative Analysis on Surface Potential of the Cracks Generated in Different Stress State |
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| LIU Da-qing,LIU Zhen-tang,LI Zhong-hui,ZHANG Yong,LIU Jie,HU Shao-bin. Comparative Analysis on Surface Potential of the Cracks Generated in Different Stress State[J]. Safety in Coal Mines, 2012, 43(2): 163-166 |
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| Authors: | LIU Da-qing LIU Zhen-tang LI Zhong-hui ZHANG Yong LIU Jie HU Shao-bin |
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| Affiliation: | (School of Safety Engineering,China University of Mining & Technology,Xuzhou 221116,China) |
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| Abstract: | The difference on the surface potential of the cracks generated in different stress state was studied by comparative analyzing on the surface potential of wing crack and secondary crack in the uniaxial loading test of the granite plate with 45° pre-existing crack.The results showed that when the role of secondary crack appears as a broken belt,the surface potential of secondary crack which generated by compression is more complex than wing crack which generated by tension.When the role of secondary crack also appears as a single crack,the surface potential of the two cracks generated in different stress state do not have significant differences on the changing trend.The complexity of the surface potential of the crack extending is not directly correlating with the stress state which generates the crack,but with the crack pattern. |
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| Keywords: | pre-existing crack crack extending stress state crack pattern surface potential |
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