Interaction Between Cracks and Effect of Micro-Crack Zone on Main Crack Tip

XIA Xiao-zhou; ZHANG Qing; QIAO Pi-zhong; LI Li-juan

doi:10.3879/j.issn.1000-0887.2010.01.007

Volume 31 Issue 1

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XIA Xiao-zhou, ZHANG Qing, QIAO Pi-zhong, LI Li-juan. Interaction Between Cracks and Effect of Micro-Crack Zone on Main Crack Tip[J]. Applied Mathematics and Mechanics, 2010, 31(1): 61-70. doi: 10.3879/j.issn.1000-0887.2010.01.007

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Interaction Between Cracks and Effect of Micro-Crack Zone on Main Crack Tip

doi: 10.3879/j.issn.1000-0887.2010.01.007

1.
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China;

Received Date: 2009-03-24
Rev Recd Date: 2009-11-03
Publish Date: 2010-01-15

Abstract

Abstract

The mechanism in teraction between cracks with differen torientations was analyzed based on the principle of superposition and a flattening method. It is found that the maxmium interaction effect will not occur when the micro crack is along the direction parallel or perpendicular to the principal tensile stress, which is different from the conclusion drawn by Ortiz [ASME Journal of Applied Mechanics, 1987, 54(3): 54-58]. The production mechanism of microcrack and the effect of microcrack zone onmain crack tip were also studied. As a result, the microcrack zone hasmagnifying effecton main crack tip, and such a magnifying effect increases with the increase of micro crack density and length.
- principle of superposition,
- stress intensity factor,
- interaction effect,
- microcrack zone

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References(13)

References

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