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Elastoplastic modelling of subsurface crack growth in rail/wheel contact problems

Roger Lundén (Institutionen för tillämpad mekanik, Dynamik)
Fatigue & Fracture of Engineering Materials and Structures Vol. 30 (2007), 10, p. 889-991.
[Artikel, refereegranskad vetenskaplig]

Propagation of small subsurface cracks subjected to shear under repeated rolling contact load is studied. An analytical crack model (Dugdale) with plastic strips at the two crack tips is employed. Compressive stresses promoting crack closure and friction between crack faces are considered. The triaxial stress state is used in the yield criterion. A damage criterion is suggested based on experimental LCF data. In a numerical study, critical crack lengths are found below which propagation of an existing crack should be effectively suppressed.

Nyckelord: crack propagation; strip-yield model; subsurface crack

Denna post skapades 2008-01-14.
CPL Pubid: 66075


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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik


Teknisk mekanik

Chalmers infrastruktur