裂纹间作用机制探讨及微裂纹区对主裂纹的作用效应研究

夏晓舟; 章青; 乔丕忠; 李丽娟

doi:10.3879/j.issn.1000-0887.2010.01.007

裂纹间作用机制探讨及微裂纹区对主裂纹的作用效应研究

doi: 10.3879/j.issn.1000-0887.2010.01.007

夏晓舟^1,2,3,
章青^1,2,
乔丕忠^1,2,4,
李丽娟³

1.
河海大学水文水资源与水利工程科学国家重点实验室,南京 210098;2.河海大学工程力学系,南京 210098;3.广东工业大学建设学院,广州 510006;4.华盛顿州立大学土木与环境工程学院,华盛顿 99164-2910,美国

基金项目: 国家自然科学基金资助项目(10972072;50679022;10872052);国家重点基础研究发展计划资助项目(2007CB714104);河海大学水文水资源和水利工程国家重点实验室开放基金资助项目(2009585912)

详细信息

作者简介:
夏晓舟(1976- ),男,江西泰和人,讲师,博士(联系人.E-mail:xiaxiaozhou@163.com);章青(1963- ),男,教授(E-mail:Lxzhangqing@hhu.edu.cn);乔丕忠(1968- ),男,教授(E-mail:qiao@wsu.edu);李丽娟(1966- ),女,教授(E-mail:lilj@gdu.tedu.cn).

中图分类号: O346
计量
- 文章访问数: 1604
- HTML全文浏览量: 166
- PDF下载量: 1010
- 被引次数: 0
出版历程
- 收稿日期: 2009-03-24
- 修回日期: 2009-11-03
- 刊出日期: 2010-01-15

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

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

摘要

摘要: 采用迭加原理和Kachanov提出的简化方法，研究了裂纹间的相互作用机理，分析了不同裂纹布置形式所产生的增强或屏蔽效应，发现当微裂纹沿着或垂直于最大拉应力方向布置时都不产生最大的作用效应，这有别于Ortiz的结论．还探讨了混凝土类材料的微裂纹的产生机制及微裂纹区对主裂纹尖端产生的作用效应，得出微裂纹区对主裂纹是起增强的作用，增强程度随微裂纹密度和微裂纹长度的增大而增大的结论．
- 迭加原理 /
- 应力强度因子 /
- 作用效应 /
- 微裂纹区
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

HTML全文

参考文献(13)

[1]	Ortiz M．A continuum theory of crack shielding in ceramics[J]．ASME Journal of Applied Mechanics,1987,54(3):54-58. doi: 10.1115/1.3172994
[2]	Ortiz M，Giannakopoulos A E．Maximal crack tip shielding by microcracking[J]. ASME Journal of Applied Mechanics,1989,56(6):279-283. doi: 10.1115/1.3176079
[3]	Kachanov M．Elastic solids with many cracks: a simple method of analysis[J]．International Journal of Solids and Structures,1987,23(1):23-43. doi: 10.1016/0020-7683(87)90030-8
[4]	Kachanov M．A simple technique of stress analysis in elastic solids with many cracks[J]. International Journal of Fracture,1985,28(1):r11-r19.
[5]	高蕴昕,郑泉水,余寿文. 损伤体有效弹性性质的细观分析和不变性描述——一个考虑微缺陷相互作用的一般理论模式[J]. 力学学报,1998,30(5):552-563.
[6]	Ju J W，Chen T M. Effective elastic module of two-dimensional brittle solids with interacting microcracks—part Ⅰ:basic formulations[J]. ASME Journal of Applied Mechanics,1994,61(6):349-357. doi: 10.1115/1.2901451
[7]	Ju J W，Chen T M．Effective elastic module of two-dimensional brittle solids with interacting microcracks—part Ⅱ: evolutionary damage models[J]．ASME Journal of Applied Mechanics,1994,61(6):358-368. doi: 10.1115/1.2901452
[8]	Chen Y Z. General case of multiple crack problems in an infinite plate[J]. Engineering Fracture Mechanics，1984,20(4):591-597. doi: 10.1016/0013-7944(84)90034-1
[9]	Feng X Q，Li J Y，Yu S W．A simple method for calculating interaction of numerous microcracks and its applications[J]．International Journal of Solid and Structures，2003,40(2):447-464. doi: 10.1016/S0020-7683(02)00519-X
[10]	Rose L R F. Microcrack interaction with a main crack[J]. International Journal of Fracture，1986,31(3):233-242. doi: 10.1007/BF00018929
[11]	Rubinstein A A. Macrocrack interaction with semi-infinite microcrack array[J].International Journal of Fracture，1985，27(2):113-119.
[12]	Yan X Q. An effective numerical approach for multiple void-crack interaction[J]. Journal of Applied Mechanics，2006，73(4):525-535. doi: 10.1115/1.2127955
[13]	伊双增．断裂．损伤理论及应用[M]．北京：清华大学出版社，1992.