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
Dashnor Hoxha Javad Eslami Dragan Grgic Duc-Phi Do
Laboratoire PRISME,Université dOrléans,8 me Léonard de Vinci,45072,Orléans France Laboratoire L2MGC,Université Cergy-Pontoise,5 Mail Gay-Lussac,95011 Neuville-sur-Oise France Laboratoire LaEGO,me doyen Marcel Roubault,54501 Vandoeuvre-les-Nancy,France
国际会议
北京
英文
715-721
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）