Digital Repository, ICMFF10

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X-FEM 2D crack propagation under rolling contact fatigue taking into account realistic residual stresses
Benoit Trollé, Marie-Christine Baietto, Anthony Gravouil

Last modified: 2015-02-05

Abstract


Due to the repeated passages of the wheels, rolling contact fatigue cracks can appear in the surface or subsurface of the rails. These defects can propagate and lead to the rail failure. A two-scale frictional contact fatigue crack model developed within the X-FEM framework is used to solve the crack problem. Realistic residual stresses, coming from dedicated software developped by SNCF are introduced in the propagation simulation via projection of the asymptotic mechanical fields. Crack growth is performed taking into account this permanent non-uniform field. Results show that SIFs ratio is modified by those residual stresses influencing the crack propagation path.

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