G. Lormand

TL;DR: In this article, the initiation and development of damage inside a 6061 Al alloy reinforced with SiC particles has been studied during in situ mechanical tests using high resolution synchrotron X-ray tomography.

TL;DR: In this paper, a three-dimensional elastic-plastic contact code based on semi-analytical method is presented and validated, where the contact is solved within a Hertz framework and the reciprocal theorem with initial strains is introduced to express the surface geometry as a function of contact pressure and plastic strains.

TL;DR: In this paper, microscopic mechanisms controlling the fatigue damage in 7010 aluminum alloy are analyzed and a crack deviation model based on linear elasticity is described, which enables one to predict if crack deviation is to occur when encountering a grain or subgrain boundary.

TL;DR: In this article, the authors present a new model that has been developed from a detailed analysis of the damage mechanism responsible for failure of bearing operating under EHD pure rolling conditions, based on the comparison between the local shear stress concentration built up around inhomogeneities present in steels and the microyield stress of the martensitic matrix.

TL;DR: In this article, a new methodology is proposed to evaluate the rolling contact fatigue (RCF) performances of bearing steels in presence of surface dents, and the experimental procedure consists in denting the raceway of the test specimen with a hardness machine using spherical diamond tips of different radius, and normal loads ranging from 5 to 50 daN.