Author(s): C. Gardin, S. Courtin, G. Bézine, D. Bertheau & H. Ben Hadj Hamouda
This study deals with the influence of roller burnishing on fatigue crack
propagation in the fillet of a crankshaft.
Destructive tests have enabled us to
obtain crack kinetics and shapes in a specimen close to the geometry of the
The beneficial effect of roller burnishing has been confirmed on both
crack initiation and propagation.
Some cracks have even been stopped.
mechanisms are likely to be linked to the compressive residual stresses induced,
and observed crack closure.
At the same time, a numerical predictive method of
the crack propagation in roller-burnished specimens has also been implemented
and gives good results.
It is based on a step-by-step process of stress intensity
factor calculations by elastic finite element analyses on models with an initial
roller burnishing stress field.
A numerical modification concerning experimental
crack closure has to be considered.
The proposed method and the developed
experimental discussion seem to possibly be extended to the case of the
crack propagation, fatigue, roller burnishing, fracture mechanics,
stress concentrators, crankshaft.
Roller burnishing is a very commonly used industrial process.
It involves a local
plastic deformation on surface that permits the fatigue strength of structures to be
Crack propagation is indeed delayed by the introduction of
Size: 793 kb
Paper DOI: 10.2495/SECM050231
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This paper can be found in the following bookComputer Methods and Experimental Measurements for Surface Effects and Contact Mechanics VII Buy