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ELLIPTICAL SUBSURFACE CRACKS UNDER A NORMAL STRESS AND A RESIDUAL STRESS FIELD
Author(s) -
Fischer F. D.,
Mayrhofer K.,
Parteder E.
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.tb00938.x
Subject(s) - residual stress , stress intensity factor , shot peening , materials science , structural engineering , stress field , finite element method , mechanics , stress concentration , induction hardening , composite material , fracture mechanics , engineering , physics
The distribution of residual stresses due to surface treatments, such as nitriding, induction hardening or shot‐peening, is explained in the introduction. The stress intensity factor distribution along an elliptical plane crack near the surface in such a residual field is presented. Existing methods including the weight function method do not allow one to find this distribution directly. Therefore, a finite element study was undertaken showing the complex character of the stress intensity factor distribution. Additionally, the calculation of the stress intensity factor distribution around the crack front for an external tension or bending load stress is explained. In these cases some simplified semi‐analytical expressions can be found.