Concept

Coefficient de Poisson

Publications associées (246)

Simulation of the Taylor-Couette flow in a finite geometry by spectral element method

The purpose of the present numerical method is to simulate the flow in between two concentric cylinders of finite axial length. The numerical integration of the transient three-dimensional incompressible Navier-Stokes equations is performed by a Legendre s ...

2000

Molecular beam epitaxy of GaN under N-rich conditions using NH3

Nicolas Grandjean

Ammonia has been used to grow GaN layers by molecular beam epitaxy on c-plane sapphire substrates. The ratio of nitrogen to Ga active species, i.e., the actual V/III ratio, has been varied from 1 to 4. It is found that increasing the V/III ratio improves t ...

1999

Numerical model of miscible grout propagation in deformable saturated porous media.

Lyesse Laloui, Laurent Vulliet, Fatiha Bouchelaghem

In an attempt to describe the basic phenomenon of grout propagation, a continuous model of miscible fluid displacement in deformable saturated porous media is proposed. In order to exhibit the relevance of the hydromechanical coupling during the mass trans ...

1999

Analysis of results on improved welded joints

Alain Nussbaumer

Recents studies have shown that the use of improvement techniques on welds allows an increase in the level of admissible fatigue strength (even more than 100%). The aim of this study was to collect and validate literature data, create a data base containin ...

1997

Surface diffusion in metal epitaxy - Strain effects

Klaus Kern, Harald Brune

A method is presented to measure both the barriers for intra-and interlayer diffusion for an epitaxial system with great accuracy. It is based upon the application of mean-field nucleation theory to variable temperature STM data. The validity and limits of ...

1997

Residual strain effects on the stress field in a thick wall finite element model of the human carotid bifurcation

Nikolaos Stergiopoulos, Jean-Jacques Meister

A three-dimensional finite element model of the carotid artery bifurcation was constructed in order to determine the stress field and assess the modification of the stress field when residual strain is taken into account. Residual strain in the carotid bif ...

1997

A new interpretation of bulge test measurements using numerical simulation

Jean-Marie Drezet

Analysis of the deflection of a circular membrane under differential pressure (bulge test) is a well-known method of determining the elastic properties of thin films. However, analytical models always suffer from simplifying hypotheses. In this study we pr ...

Elsevier1996

Thermal expansion of metals reinforced with ceramic particles and microcellular foams

Andreas Mortensen

The thermal expansion of three isotropic metal-matrix composites, reinforced with SiC particles or microcellular foam, is measured between 25 degrees C and 325 degrees C. All three composites show initial coefficient of thermal expansion (CTE) values in ag ...

1996

Synergistic effects of fluid shear stress and cyclic circumferential stretch on vascular endothelial cell morphology and cytoskeleton

Jean-Jacques Meister

The development of atherosclerosis is thought to be initiated by a dysfunctional state of the vascular endothelium. The proposal that mechanical forces play a role in the localization of this disease has led researchers to develop in vitro models to assess ...

American Heart Association1995

A device for subjecting vascular endothelial cells to both fluid shear stress and circumferential cyclic stretch

Jean-Jacques Meister

The proposal of the role of mechanical forces as a localizing factor of atherosclerosis has led many researchers to investigate their effects on vascular endothelial cells. Most previous efforts have concentrated on either the fluid shear stress, which res ...

Springer Verlag1994

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