Surface crack and cracks networks in biaxial fatigue

Abstract : Semi-elliptical fatigue crack growth in 304 L stainless steel, under biaxial loading, was investigated. Compared to those of through-cracks under uniaxial loading, the growth rate of surface cracks is increased by a non-singular compressive stress and reduced by a tensile stress, when R = 0. Plasticity-induced crack closure under biaxial loading was investigated through 3D finite element simulations with node release. Roughness and phase-transformation-induced closure effects were also discussed. The interactions in two-directional crack networks under biaxial tension were investigated numerically. It appears that the presence of orthogonal cracks should not be ignored. The beneficial influence of interaction-induced mode-mixities was highlighted.
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Submitted on : Sunday, November 5, 2006 - 6:25:52 PM
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A. Kane, Véronique Doquet. Surface crack and cracks networks in biaxial fatigue. Engineering Fracture Mechanics, Elsevier, 2006, 73, pp.233-251. ⟨10.1016/j.engfracmech.2005.05.009⟩. ⟨hal-00111468⟩



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