Publications associées à Fragilisation par l'hydrogène

Softening and hardening of yield stress by hydrogen–solute interactions

William Curtin, Binglun Yin, Ali Tehranchi

Hydrogen atoms have a wide variety of effects on the mechanical performance of metals, and the underlying mechanisms associated with effects on plastic flow and embrittlement remain to be discovered or validated. Here, the reduction in the plastic flow str ...

Taylor & Francis2017

Stress intensity factors for axial semi-elliptical surface cracks and embedded elliptical cracks at longitudinal butt welded joints of steel-lined pressure tunnels and shafts considering weld shape

Anton Schleiss, Pedro Filipe De Almeida Manso, Alexandre Jean Pachoud

When for steel liners of pressure tunnels and shafts high-strength steels are used, welded joints are subject to the risk of hydrogen induced cold-cracking in the base material. Longitudinal butt welded joints are critical regions as they are loaded transv ...

Elsevier2017

Hydrogen reduction of molybdenum oxide at room temperature

Frank Nüesch, Roland Hany

The color changes in chemo-and photochromic MoO3 used in sensors and in organic photovoltaic (OPV) cells can be traced back to intercalated hydrogen atoms stemming either from gaseous hydrogen dissociated at catalytic surfaces or from photocatalytically sp ...

Springer Nature2017

A 3D printed beam splitter for polar neutral molecules

Andreas Osterwalder, Sean Dennis Steven Gordon

We describe a beam splitter for polar neutral molecules. An electrostatic hexapole initially confines and guides a supersonic expansion of ammonia, and it then smoothly transforms into two bent quadrupole guides, thus splitting the molecular beam in two co ...

2017

Atomistic study of hydrogen embrittlement of grain boundaries in nickel: II. Decohesion

William Curtin, Ali Tehranchi

Atomistic simulations of bicrystal samples containing a grain boundary are used to examine the effect of hydrogen atoms on the nucleation of intergranular cracks in Ni. Specifically, the theoretical strength is obtained by rigid separation of the two cryst ...

Institute of Physics2017

Fracturing in Dry and Saturated Porous Media

Enrico Milanese

It is now generally recognized that mode I fracturing in saturated geomaterials is a stepwise process. This is true both for mechanical loading and for pressure induced fracturing. Evidence comes from geophysics, from unconventional hydrocarbon extraction, ...

Springer International Publishing2017

Axially Equilibrated Displacement-based Beam Element: Implementation in OpenSees and Application to Dynamic Analysis of Structures

Katrin Beyer, João Saraiva Esteves Pacheco de Almeida, Danilo Tarquini

Experimental tests on the inelastic behavior of RC bridge piers have shown that, due to tension shift effects, the curvature profile above the base section of the structural member differs from the one that would develop according to a force-based or a cla ...

2017

Interplay between Process Zone and Material Heterogeneities for Dynamic Cracks

Jean-François Molinari, Fabian Barras

Using an elastodynamic boundary integral formulation coupled with a cohesive model, we study the problem of a dynamic rupture front propagating along an heterogeneous plane. We show that small-scale heterogeneities facilitate the supershear transition of a ...

American Physical Society2017

Mixed mode fracture properties of GFRP-adhesive interfaces based on video gauge and acoustic emission measurements from specimens with adherend fibres normal to the interfaces

Thomas Keller, Wei Sun, Wendel Michael Sebastian

Mixed-mode bending tests were performed on fifty-three GFRP-adhesive-GFRP specimens. In each specimen the pre-crack was located near the GFRP adherend with fibres normal to the GFRP-adhesive interface, so as to encourage crack propagation along this interf ...

Elsevier2017

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Fragilisation par l'hydrogène

Softening and hardening of yield stress by hydrogen–solute interactions

Stress intensity factors for axial semi-elliptical surface cracks and embedded elliptical cracks at longitudinal butt welded joints of steel-lined pressure tunnels and shafts considering weld shape

Hydrogen reduction of molybdenum oxide at room temperature

A 3D printed beam splitter for polar neutral molecules

Atomistic mechanisms of hydrogen embrittlement

Atomistic study of hydrogen embrittlement of grain boundaries in nickel: II. Decohesion

Fracturing in Dry and Saturated Porous Media

Axially Equilibrated Displacement-based Beam Element: Implementation in OpenSees and Application to Dynamic Analysis of Structures

Interplay between Process Zone and Material Heterogeneities for Dynamic Cracks

Mixed mode fracture properties of GFRP-adhesive interfaces based on video gauge and acoustic emission measurements from specimens with adherend fibres normal to the interfaces

Graph Chatbot

Chattez avec Graph Search

Interplay between Process Zone and Material Heterogeneities for Dynamic Cracks

Softening and hardening of yield stress by hydrogen–solute interactions

Hydrogen reduction of molybdenum oxide at room temperature

Atomistic mechanisms of hydrogen embrittlement

Atomistic study of hydrogen embrittlement of grain boundaries in nickel: II. Decohesion

A 3D printed beam splitter for polar neutral molecules

Fracturing in Dry and Saturated Porous Media

Mixed mode fracture properties of GFRP-adhesive interfaces based on video gauge and acoustic emission measurements from specimens with adherend fibres normal to the interfaces

Stress intensity factors for axial semi-elliptical surface cracks and embedded elliptical cracks at longitudinal butt welded joints of steel-lined pressure tunnels and shafts considering weld shape

Axially Equilibrated Displacement-based Beam Element: Implementation in OpenSees and Application to Dynamic Analysis of Structures