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STRESS‐RATIO EFFECT OF FATIGUE CRACK PROPAGATION IN A BIAXIAL STRESS FIELD
Author(s) -
HOSHIDE T.,
TANAK.A K.,
YAMADA A.
Publication year - 1981
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.1460-2695.1981.tb01132.x
Subject(s) - crack closure , materials science , stress intensity factor , cruciform , fracture mechanics , crack growth resistance curve , stress concentration , crack tip opening displacement , composite material , structural engineering , stress (linguistics) , shear stress , stress field , engineering , finite element method , linguistics , philosophy
Fatigue crack propagation tests were conducted under conditions of equibiaxial, uniaxial and shear loading by using a cruciform specimen in a servo hydraulic testing machine. The effect of non‐singular stress cycling on the fatigue crack propagation rate was examined based on the observation of crack opening behavior. The crack propagation rate was significantly influenced by the non‐singular stress parallel to the crack when it was correlated to the stress intensity range. The crack closure behavior was greatly affected by the non‐singular stress. The crack propagation rate was uniquely correlated to the effective range of the stress intensity factor except for the case of completely reversed shear loading where significant plasticity was detected. The crack opening displacement range was concluded to be a parameter controlling the crack propagation rate for all the stress conditions examined in the present experiments. Some discussion is made on the effect of material anisotropy on fatigue crack propagation in a biaxial stress field.