The effects of crack surface friction and roughness on crack tip stress fields | Zendy

Roberto Ballarini | Zendy; Michael E. Plesha | Zendy

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The effects of crack surface friction and roughness on crack tip stress fields

Author(s) -

Roberto Ballarini,

Michael E. Plesha

Publication year - 1987

Publication title -

international journal of fracture

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.973

H-Index - 95

eISSN - 1573-2673

pISSN - 0376-9429

DOI - 10.1007/bf00019717

Subject(s) - tortuosity , materials science , stress intensity factor , crack closure , crack tip opening displacement , stress field , fracture mechanics , surface finish , composite material , surface roughness , stress concentration , shear stress , fracture (geology) , stress (linguistics) , mechanics , shear (geology) , structural engineering , finite element method , engineering , physics , linguistics , philosophy , porosity

A model is presented which can be used to incorporate the effects of friction and tortuosity along crack surfaces through a constitutive law applied to the interface between opposing crack surfaces. The problem of a crack with a saw-tooth surface in an infinite medium subjected to a far-field shear stress is solved and the ratios of mode I stress intensity to mode II stress intensity are calculated for various coefficients of friction and material properties. The results show that tortuosity and friction lead to an increase in fracture loads and alter the direction of crack propagation.

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