Premium
A mixed mode rock fracture model for the prediction of crack path
Author(s) -
Lewis R. W.,
Koosha B.
Publication year - 1999
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/(sici)1096-9853(19990410)23:4<281::aid-nag969>3.0.co;2-e
Subject(s) - mode (computer interface) , structural engineering , stress intensity factor , fracture (geology) , mixed mode , fracture mechanics , displacement (psychology) , finite element method , crack tip opening displacement , ultimate tensile strength , materials science , path (computing) , stress (linguistics) , geotechnical engineering , mechanics , engineering , geology , composite material , computer science , physics , psychology , linguistics , philosophy , psychotherapist , programming language , operating system
Crack propagation in rocks is simulated by using a displacement substitution method based on a mixed mode fracture criterion. The main advantage of this model is that it can distinguish between mode I and mode II stress intensity factors simultaneously. A typical finite element program is used to compute displacements adjacent to the crack tip. The maximum circumferential tensile stress is adopted as a ‘yield surface’ for the calculation of the load factor in each crack increment. Pure mode I and mixed mode examples have been analysed to validate the capability of the model. Copyright © 1999 John Wiley & Sons, Ltd.