Concept

Skull fracture

Related publications (161)

New theory for. Mode I crack-tip dislocation emission

A material is intrinsically ductile under Mode I loading when the critical stress intensity K-Ie for dislocation emission is lower than the critical stress intensity K-Ic for cleavage. K-Ie is usually evaluated using the approximate Rice theory, which pred ...

2017

Influence of geometrical imperfections and flaws at welds of steel liners on fatigue behavior of pressure tunnels and shafts in anisotropic rock

Alexandre Jean Pachoud

High-head steel lined pressure tunnels and shafts may be considered as critical infrastructures especially when rock overburden is small. In the case of lining failure, catastrophic damages can occur when a large amount of water can reach the steep valley ...

EPFL-LCH2017

Atomistic study of hydrogen embrittlement of grain boundaries in nickel: I. Fracture

William Curtin, Ali Tehranchi

Hydrogen ingress into a metal is a persistent source of embrittlement. Fracture surfaces are often intergranular, suggesting favorable cleave crack growth along grain boundaries (GBs) as one driver for embrittlement. Here, atomistic simulations are used to ...

Elsevier2017

Crack growth and fracture toughness of amorphous Li-Si anodes: Mechanisms and role of charging/discharging studied by atomistic simulations

William Curtin, Seyed Mostafa Khosrownejad

Fracture is the main cause of degradation and capacity fading in lithiated silicon during cycling. Experiments on the fracture of lithiated silicon show conflicting results, and so mechanistic models can help interpret experiments and guide component desig ...

Elsevier2017

Compression testing spherical particles for strength: Theory of the meridian crack test and implementation for microscopic fused quartz

Andreas Mortensen, Goran Zagar, Raphaël Charvet, Cyril Dénéréaz, Václav Pejchal

We show that uniaxial compression testing of spherical particles can give unambiguous access to their tensile strength as governed by surface flaws if one uses pairs of elasto-plastic platens, tailoring their hardness in order to control the relative area ...

2017

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

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

Contribution of Genetic Background and Clinical Risk Factors to Low-Trauma Fractures in Human Immunodeficiency Virus (HIV)-Positive Persons: The Swiss HIV Cohort Study

Jacques Fellay, Istvan Bartha, Thomas Junier

Background. The impact of human genetic background on low-trauma fracture (LTF) risk has not been evaluated in the context of human immunodeficiency virus (HIV) and clinical LTF risk factors. Methods. In the general population, 6 common single-nucleotide p ...

Oxford University Press (OUP)2016

Length Scale of interface heterogeneities selects propagation mechanism of frictional slip fronts

Jean-François Molinari, David Simon Kammer

We present three-dimensional finite-element simulations showing the propagation of slip fronts at striped heterogeneous interfaces. The heterogeneous area consists of alternating stripes of weaker and stronger frictional properties, which is equivalent to ...

Elsevier2016

20 Hz X-ray tomography during an in situ tensile test

Andreas Mortensen

This paper describes an in-situ tensile test in synchrotron tomography achieved for the first time with a frequency of 20 tomograms per second (20 Hz acquisition frequency). This allows us to capture rapid material fracture processes, such as that of a met ...

Springer2016

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