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A SIMPLE THEORY FOR LOW CYCLE MULTIAXIAL FATIGUE
Author(s) -
LOHR R.D.,
ELLISON E. G.
Publication year - 1980
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.1460-2695.1980.tb01101.x
Subject(s) - low cycle fatigue , simple (philosophy) , structural engineering , fatigue testing , materials science , shear (geology) , strain (injury) , plane (geometry) , fracture mechanics , engineering , composite material , mathematics , geometry , medicine , philosophy , epistemology
— A theoretical development based on a simple physical model is proposed to help the designer predict high strain multi‐axial fatigue behaviour. This approach hypothesises that the maximum shear strain γ*, on planes driving the crack through the thickness, controls the fatigue crack propagation rate and hence the life. The direct strain δ* n acting normal to the plane of γ* can exert a secondary modifying influence. Experimental results from several research laboratories have been analysed in this manner with some success.