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|Title:||Interaction between microcracks and a main crack in a semi-infinite medium|
|Authors:||Lam, K.Y. |
|Source:||Lam, K.Y.,Cao, W.,Zhuang, T. (1993-03). Interaction between microcracks and a main crack in a semi-infinite medium. Engineering Fracture Mechanics 44 (5) : 753-761. ScholarBank@NUS Repository.|
|Abstract:||A very efficient numerical scheme for solving fracture problems involving two-dimensional elastic interaction between multiple microcracks and a main crack in a semi-infinite medium is proposed. The analysis is based on a singular integral equation method in which the microcracks and main crack are represented by distributions of edge dislocations. It is seen that this interaction could produce either an enhancement or a shielding effect on the stress intensity factors depending on the positions and orientations of the microcracks relative to the main crack in a semi-infinite medium. Typical examples are presented for one parallel microcrack, two equal microcracks and a semi-infinite array of periodically distributed collinear microcracks subjected to a remote mode I loading. For one collinear microcrack, the present solutions are compared with the exact solutions given in terms of elliptic integral; very good agreement is obtained. © 1993.|
|Source Title:||Engineering Fracture Mechanics|
|Appears in Collections:||Staff Publications|
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