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拉剪作用下煤岩不等长平行偏置裂纹相互作用 被引量:2

Interaction of unequal offset parallel cracks under tension-shear stress in coal
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摘要 为研究天然煤岩体中多裂纹的相互作用规律,采用经典Kachanov法,通过分析应力强度因子比的变化,研究了拉剪作用下不等长平行偏置双裂纹间水平距离、垂直距离以及裂纹长度对彼此相互作用的影响规律.并借助RFPA2D软件对不同间距条件下的裂纹起裂扩展进行数值模拟验证,其结果与理论计算吻合良好.结果表明:裂纹间的相互影响包括强化作用、屏蔽作用和零效应3种形式,且三者随水平距离、垂直距离和裂纹长度的不同而相互转化;距离裂纹尖端越近,强化作用越强烈,且强化作用变化速率也越快,距离裂纹中心越近,屏蔽作用越强烈,且屏蔽作用变化速率也越快,裂纹长度越长,其影响范围也越大. In order to research the interaction rules of multiple cracks in coal and rock mass, based on Kachanov method, the interaction rules of two unequal offset parallel cracks with different level interval, vertical interval and crack length were analyzed by stress intensity factor ratio under tension-shear stress. The processes of crack initiation and propagation were simulated by RFPA2D, and the simulation results fit the theory well. The results show that the interactions of offset parallel cracks include exist reinforcing effect and shielding effect, and the two effects transform mutually with the variations of level interval, vertical interval and crack length; The reinforcing effect becomes more and more severe with the decrease of distance to the crack tip, and the rate of change becomes faster too. The shielding effect becomes more and more severe with the decrease of distance to the center of crack, and the rate of change becomes faster too. The influence range of crack becomes more and more wide with the increase of length.
出处 《辽宁工程技术大学学报(自然科学版)》 CAS 北大核心 2016年第11期1212-1219,共8页 Journal of Liaoning Technical University (Natural Science)
基金 国家自然科学基金(51174208 U1361209) 国家重点基础研究发展计划(973计划)(2013CB227903)
关键词 煤岩体 平行偏置裂纹 Kachanov法 应力强度因子 相互作用 coal and rock mass offset parallel cracks Kachanov method stress intensity factor interaction
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参考文献11

  • 1HORII H,Nemat-Nasser S.Compression-induced microcrack growth in brittle solids: Axial splitting and shear failure[J].Journal of Geophysical Research:Solid Earth(1978-2012),1985,90(B4): 3 105-3 125.
  • 2CHEN Y Z.Numerical solution for multiple crack problem in an infinite plate under compression[J].International Journal of Fracture, 2004,129(1):51-62.
  • 3KACHANOV M.Effective elastic properties of cracked solids: critical review of some basic concepts[J].Applied Mechanics Reviews,1992,45(8):304-335.
  • 4KACHANOV M.Elastic solids with many cracks: a simple method of analysis[J].International Journal of Solids and Structures,1987, 23(1):23-43.
  • 5KACHANOV M.A simple technique of stress analysis in elastic solids with many cracks[J].International Journal of Fracture,1985, 28(1):R11-R19.
  • 6LI Y P,THAM L G,WANG Y H,TSUI Y.A modified Kachanov method for analysis of solids with multiple cracks[J].Engineering Fracture Mechanics,2003,70(9):1 115-1 129.
  • 7李银平,杨春和.近置多裂纹相互作用的渐近分析方法[J].力学学报,2005,37(5):600-605. 被引量:11
  • 8范永波.平面应力条件下共线双裂纹的拉伸特性[J].辽宁工程技术大学学报(自然科学版),2010,29(6):1090-1094. 被引量:4
  • 9席婧仪,陈忠辉,朱帝杰,张伟,洪钦峰.拉、压剪作用下煤岩不等长共线裂纹相互作用[J].辽宁工程技术大学学报(自然科学版),2015,34(4):474-479. 被引量:1
  • 10汪微微,赵建平.平行偏置裂纹相互作用及其合并条件[J].南京工业大学学报(自然科学版),2009,31(4):27-31. 被引量:8

二级参考文献64

  • 1张永兴,周小平,朱可善.加载条件下裂隙间相互作用对断续裂隙岩体变形的影响[J].工程力学,2005,22(2):218-223. 被引量:1
  • 2秦红,陈新德,孙连奎,郑敏荣.多裂纹弹塑性断裂评定研究[J].石油化工设备,1996,25(4):8-16. 被引量:4
  • 3闫相桥.有限长主裂纹与微裂纹的相互作用[J].哈尔滨工业大学学报,2006,38(4):503-506. 被引量:2
  • 4肖俊华,蒋持平.周期张开型平行裂纹问题研究[J].力学学报,2007,39(2):278-282. 被引量:6
  • 5Lam K Y,Phua S P.Multiple crack interaction and its effect on stress intensity factor[J].Engineering Fracture Mechanics,1991,40(3):585-592.
  • 6Bachir B B,Benguediab M,Elmeguenni M,et al.Analysis of the effect of micro-crack on the plastic strain ahead of main crack in aluminum alloys 2024 T3[J].Computational Materials Science,2008,42:100-106.
  • 7Bittencourt T N,Wawrzynek P A,Ingraffeat A R,et al.Quasi-automatic simulation of crack propagation for 2D LEFM problems[J].Engineering Fracture Mechanics,1996,55(2):321-334.
  • 8中国特种设备检测研究中心.GB/T19624-2004在用含缺陷压力容器安全评定[S].北京:中国标准出版社,2005.
  • 9Li Y P,Tham L G,Wang Y H,et al.A modified Kachanov method for analysis of solids with multiple cracks[J].Engineering Fracture Mechanics,2003,70(9):1115-1129.
  • 10Chen Y Z.Multiple crack problems for two bonded half planes in plane and antiplane elasticity[J].Engng Fracture Mech,1986,25,1-9.

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