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Modeling Damage by Crack Nucleation and Growth in Porous Media
While crack propagation is considered as the predominant mechanism of damage in quasi brittle rocks, recent observation on cracking evolution on porous rocks have shown that nucleation of new cracks and back-sliding mechanism of cracks are perhaps as important as the crack propagation. The model proposed here tends to explain the laboratory results that could not be explained within framework of crack-sliding model. A crack nucleation mechanism is then considered to generate an increasing number of cracks based upon a statistical distribution of strain energy cumulated on grain to grain contacts. The increasing role of crack growth and crack coalescence is modeled by an avalanche like mechanism that leads finally to the failure of a porous rock. Predictions of the model are compared with experimentally results in terms of strains and acoustic emission
Modeling Damage by Crack Nucleation and Growth in Porous Media
While crack propagation is considered as the predominant mechanism of damage in quasi brittle rocks, recent observation on cracking evolution on porous rocks have shown that nucleation of new cracks and back-sliding mechanism of cracks are perhaps as important as the crack propagation. The model proposed here tends to explain the laboratory results that could not be explained within framework of crack-sliding model. A crack nucleation mechanism is then considered to generate an increasing number of cracks based upon a statistical distribution of strain energy cumulated on grain to grain contacts. The increasing role of crack growth and crack coalescence is modeled by an avalanche like mechanism that leads finally to the failure of a porous rock. Predictions of the model are compared with experimentally results in terms of strains and acoustic emission
Modeling Damage by Crack Nucleation and Growth in Porous Media
Springer Ser.Geomech.,Geoengineer.
Yang, Qiang (editor) / Zhang, Jian-Min (editor) / Zheng, Hong (editor) / Yao, Yangping (editor) / Hoxha, Dashnor (author) / Eslami, Javad (author) / Grgic, Dragan (author) / Do, Duc-Phi (author)
2013-01-01
7 pages
Article/Chapter (Book)
Electronic Resource
English
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