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CLOSURE AND GROWTH OF MODE I CRACKS IN BIAXIAL FATIGUE
Author(s) -
McClung R. C.
Publication year - 1989
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.1460-2695.1989.tb00552.x
Subject(s) - materials science , crack closure , shear (geology) , closure (psychology) , paris' law , composite material , finite element method , structural engineering , stress (linguistics) , crack growth resistance curve , fracture mechanics , engineering , economics , market economy , linguistics , philosophy
— —The closure behavior of mode I fatigue cracks under biaxial loading is studied with an elastic‐plastic plane stress finite element model. Biaxial stresses are shown to have a significant impact on crack closure behavior at higher maximum stresses. In general, normalized crack opening stresses are highest for equibiaxial loading and lowest for pure shear loading. The differences are apparently negligible for maximum applied stresses less than about 0.4 σ 0 . Experimental crack growth data are quantitatively consistent with these trends. Correlations of the experimental data with a simple Δ K eff were successful as first‐order engineering estimates. Changes in forward and reversed plastic zone sizes with biaxiality are not entirely consistent with trends in crack growth rates.