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Applied Mathematics and Mechanics (English Edition) ›› 2010, Vol. 31 ›› Issue (1): 67-76.doi: https://doi.org/10.1007/s10483-010-0107-z

• Articles • 上一篇    下一篇

Interaction between cracks and effect of microcrack zone on main crack tip

夏晓舟1,2,3 章青2,3 乔丕忠2,3,4 李丽娟1   

  1. 1. The Faculty of Construction, Guangdong University of Technology, Guangzhou 510006, P. R. China;
    2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China;
    3. Department of Engineering Mechanics, Hohai University, Nanjing 210098, P. R. China;
    4. Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, United States of America
  • 收稿日期:2009-03-24 修回日期:2009-11-05 出版日期:2010-01-03 发布日期:2010-01-01

Interaction between cracks and effect of microcrack zone on main crack tip

XIA Xiao-Zhou1,2,, ZHANG Qing2,3, QIAO Pi-Zhong2,3,4, LI Li-Juan1   

  1. 1. The Faculty of Construction, Guangdong University of Technology, Guangzhou 510006, P. R. China;
    2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China;
    3. Department of Engineering Mechanics, Hohai University, Nanjing 210098, P. R. China;
    4. Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, United States of America
  • Received:2009-03-24 Revised:2009-11-05 Online:2010-01-03 Published:2010-01-01

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摘要： Mechanism interaction between cracks with different orientation angles is analyzed based on the principle of superposition and a flattening method. It is found that the maximum interaction effect does not occur when the microcrack is along the direction parallel or perpendicular to the principal tensile stress, which is different from the conclusion drawn by Ortiz (1987). The mechanism of microcrack generation and the effect of the microcrack zone on the main crack tip are studied. It is concluded that the microcrack zone has effect on the main crack tip, which increases with the increase of microcrack density and length.

Abstract: Mechanism interaction between cracks with different orientation angles is analyzed based on the principle of superposition and a flattening method. It is found that the maximum interaction effect does not occur when the microcrack is along the direction parallel or perpendicular to the principal tensile stress, which is different from the conclusion drawn by Ortiz (1987). The mechanism of microcrack generation and the effect of the microcrack zone on the main crack tip are studied. It is concluded that the microcrack zone has effect on the main crack tip, which increases with the increase of microcrack density and length.

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