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MIXED MODE FATIGUE CRACK THRESHOLDS FROM BENDING AND CYCLIC TORSION OF A PLATE
Author(s) -
Egami N.,
Kitaoka S.
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.tb00991.x
Subject(s) - materials science , torsion (gastropod) , crack closure , composite material , fracture mechanics , structural engineering , cyclic stress , strain energy density function , bending , crack growth resistance curve , crack tip opening displacement , finite element method , engineering , medicine , surgery
— The effects of plate thickness and crack shape on the threshold condition for crack propagation under cyclic bending or torsion, was studied using a through or a surface pre‐crack in a carbon steel plate of various thicknesses. It was concluded that the magnitude of the frictional stress acting on the crack surface at the propagation threshold under cyclic torsion was significantly affected by the plate thickness. An estimation method for the threshold condition for crack propagation under mixed‐mode loading for a particular plate thickness was proposed on the basis of the strain energy density criterion.