Dimensionnement à la fatigue thermomécanique de disques de frein automobiles en fonte à graphite lamellaire

Abstract : This thesis aims at developing an approach for thermomechanical fatigue design of automotive brake discs made of flake graphite (grey) cast-iron. The first step of this work consists of modeling the nonlinear cyclic behavior and tension/compression strong dissymmetry of grey cast iron. The proposed model is based on the introduction of a second-order induced damage tensor. From the analysis of the damage mechanisms, a fatigue criterion based on the dissipated energy per cycle, allowing crack initiation in the critical areas to be defined, is proposed. Finally, the formation of crack networks on braking discs is studied.
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Louis Augustins. Dimensionnement à la fatigue thermomécanique de disques de frein automobiles en fonte à graphite lamellaire. Mécanique [physics.med-ph]. Université Pierre et Marie Curie - Paris VI, 2014. Français. ⟨NNT : 2014PA066246⟩. ⟨tel-02177431⟩

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