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Fatigue crack growth rates under sequential mixed‐mode I and II loading cycles
Author(s) -
Wong S. L.,
Bold P. E.,
Brown M. W.,
Allen R. J.
Publication year - 2000
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 - 10.1046/j.1460-2695.2000.00342.x
Subject(s) - mixed mode , paris' law , structural engineering , mode (computer interface) , materials science , fracture mechanics , crack closure , stress intensity factor , fatigue testing , failure mode and effects analysis , stress concentration , engineering , mechanics , composite material , computer science , physics , operating system
One common mode of failure that occurs in rolling bodies such as gears, bearings and rails is due to the fatigue process. Several research workers suggest that rolling contact fatigue cracks are subjected to mixed mode I and II loading cycles. It is believed that the correct modelling of loading cycles can help us to study the mechanics of crack growth because fatigue comprises a major safety consideration in the design process. Experiments have been performed under nonproportional mixed‐mode I and II loading cycles with fixed degrees of overlap, so that coplanar cracks were produced. Three empirical crack propagation laws have been established which are related to both mode I and mode II effective stress intensity factor ranges.