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FATIGUE CRACK GROWTH UNDER MIXED‐MODE I AND II LOADING
Author(s) -
Qian J.,
Fatemi A.
Publication year - 1996
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1996.tb00950.x
Subject(s) - paris' law , stress intensity factor , crack closure , materials science , crack growth resistance curve , growth rate , structural engineering , strain energy release rate , mode (computer interface) , mixed mode , composite material , finite element method , crack tip opening displacement , strain energy density function , stress concentration , stress (linguistics) , fracture mechanics , mathematics , engineering , geometry , computer science , linguistics , philosophy , operating system
— Mixed‐mode fatigue crack growth has been studied using four point bend specimens under asymmetric loads. A detailed finite element analysis provides the stress intensity factors for curved cracks under different mixed‐mode load conditions. Both fatigue crack growth direction and crack growth rate are studied. The maximum tangential stress and the minimum strain energy density criteria were found to provide satisfactory predictions of the crack growth directions. An effective stress intensity factor was used to correlate the fatigue crack growth rates successfully. It is found that the use of mode I fatigue crack growth rate properties results in a conservative crack growth rate prediction for mixed‐mode load conditions.