Topic
Hydrostatic stress
About: Hydrostatic stress is a research topic. Over the lifetime, 1568 publications have been published within this topic receiving 37773 citations.
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TL;DR: In this article, a C(T) specimen of a ferritic steel under hydrogen charging is simulated by fully coupled finite element analyses of hydrogen kinetics and mechanical behaviour. But the simulation results are compared with test results, and the results show that hydrogen concentration, which is obtained from the sorption and diffusion analysis, causes a reduction in the yield strength and the cohesive strength.
Abstract: The effect of hydrogen on the mechanical behaviour of steels is twofold: it affects the local yield strength and it accelerates material damage. On the other hand, the diffusion behaviour is influenced by the hydrostatic stress, the plastic deformation and the strain rate. This requires a coupled model of deformation, damage, hydrogen sorption and diffusion. The deformation behaviour is described by von Mises plasticity with isotropic hardening, and crack extension is simulated by a cohesive zone model. The local hydrogen concentration, which is obtained from the sorption and diffusion analysis, causes a reduction in the yield strength and the cohesive strength. Crack extension in a C(T) specimen of a ferritic steel under hydrogen charging is simulated by fully coupled finite element analyses of hydrogen kinetics and mechanical behaviour. The simulation results are compared with test results.
29 citations
TL;DR: In this article, the authors consider closed thermodynamic systems involving both fluid present and fluid absent mineral reactions and show that the difference in conditions defining equilibrium for hydrostatic and non-hydrostatic conditions is a second order effect; multiple equilibrium states can exist.
29 citations
TL;DR: In this article, a microstructural-based high cycle fatigue strength modeling approach applied to different cast Al-Si alloys used in an automotive context is described. But the model does not take into account the influence of the grain size on the threshold of the stress intensity factor.
29 citations
TL;DR: In this article, a numerical simulation has been carried out by using a mixed displacement/pressure (u/p) finite element method to achieve a more intensive understanding of the forming mechanism of the fine-blanking process.
29 citations
29 citations