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Affichage de 1311 à 1320 sur 1881

Article dans une revue

Efficient meshless SPH method for the numerical modeling of thick shell structures undergoing large deformations

Jun Lin, Hakim Naceur, Daniel Coutellier, Abdel Laksimi

The objective of this paper is to present an extension of the Lagrangian Smoothed Particle Hydrodynamics (SPH) method to solve three-dimensional shell-like structures undergoing large deformations. The present method is an enhancement of the classical stabilized SPH commonly used for 3D continua,…

International Journal of Non-Linear Mechanics, 2014, 65, pp.1-13. ⟨10.1016/j.ijnonlinmec.2014.04.009⟩. ⟨hal-03619857⟩

Article dans une revue

A Combined DMI–RLS Algorithm in Adaptive Processing Antenna System

Aounallah Naceur, Merahi Bouziani, Abdelmalik Taleb-Ahmed

Smart antenna systems are rapidly emerging as one of the key technologies that can enhance overall wireless communications system performance. The purpose of this paper is to develop a novel adaptive beamforming system from two adaptive algorithms that are known in the literature as spatial filters…

Arabian Journal for Science and Engineering, 2014, 39 (10), pp.7109-7116. ⟨10.1007/s13369-014-1230-4⟩. ⟨hal-03644532⟩

Article dans une revue

An Experimental and Numerical Study on the Effects of the Flat Heat Pipe Wick Structure on Its Thermal Performance

Hamdy Hassan, Souad Harmand

This paper presents an experimental and numerical work on the effect of flat heat pipe construction on the cooling of an electronic component. The flat heat pipe is heated via 1-cm-diameter circular electrical resistance (the evaporator side), and the other side (the condenser side) is cooled by…

Heat Transfer Engineering, 2014, 36 (3), pp.278-289. ⟨10.1080/01457632.2014.916157⟩. ⟨hal-03451849⟩

Article dans une revue

New MIP model for multiprocessor scheduling problem with communication delays

Abdessamad Ait El Cadi, Rabie Ben Atitallah, Said Hanafi, Nenad Mladenovic, Abdelhakim Artiba

In this paper we consider scheduling tasks on a multiprocessor system, taking into account communication delays. We propose a new Mixed Integer Program (MIP) formulation that drastically reduces both the number of variables and the number of constraints, when compared to the best mathematical…

Optimization Letters, 2014, 11 (6), pp.1091-1107. ⟨10.1007/s11590-014-0802-2⟩. ⟨hal-01104613⟩

Article dans une revue

Complementary tribometers for the analysis of contact phenomena in grinding

Eduardo García, José Antonio Sánchez, Damien Méresse, Iñigo Pombo, Laurent Dubar

The characterization of friction and tribological phenomena occurring in grinding requires reliable experimental input data. Up to now, existing test benches exhibit important limitations. Steep thermal gradients and elastic deformations of both machine structure, and rubbing elements are the main…

Journal of Materials Processing Technology, 2014, 214 (9), pp.1787-1797. ⟨10.1016/j.jmatprotec.2014.03.026⟩. ⟨hal-03624510⟩

Article dans une revue

Roughness characterization of the galling of metals

Cédric Hubert, Julie Marteau, Raphaël Deltombe, Y Chen, Maxence Bigerelle

Several kinds of tests exist to characterize the galling of metals, such as that specified in ASTM Standard G98. While the testing procedure is accurate and robust, the analysis of the specimenʼs surfaces (${\rm area}=1.2\;{\rm cm}$) for the determination of the critical pressure of galling remains…

Surface Topography: Metrology and Properties, 2014, 2 (3), pp.034002. ⟨10.1088/2051-672X/2/3/034002⟩. ⟨hal-02968722⟩

Article dans une revue

Time Series Modelling and Forecasting of Emergency Department Overcrowding

Farid Kadri, Fouzi Harrou, Sondès Chaabane, Christian Tahon

Efficient management of patient flow (demand) in emergency departments (EDs) has become an urgent issue for many hospital administrations. Today, more and more attention is being paid to hospital management systems to optimally manage patient flow and to improve management strategies, efficiency…

Journal of Medical Systems, 2014, 38 (9), pp.107. ⟨10.1007/s10916-014-0107-0⟩. ⟨hal-03644578⟩

Article dans une revue

Characterization and micromechanical modeling of the human cranial bone elastic properties

Jamila Rahmoun, Audrey Auperrin, Rémi Delille, Hakim Naceur, Pascal Drazetic

This paper is devoted to the experimental characterization and micromechanical modeling of the elastic behavior of the human cranial bone. Three points bending tests on the frontal, parietal and temporal bone specimens have been performed to determine their mechanical characteristics under quasi-…

Mechanics Research Communications, 2014, 60, pp.7-14. ⟨10.1016/j.mechrescom.2014.04.001⟩. ⟨hal-03624462⟩

Article dans une revue

Heat transfer coefficient distribution on the pole face of a hydrogenerator scale model

Federico Torriano, Nicolas Lancial, Melanie Levesque, Gilles Rolland, Claude Hudon, François Beaubert, Jean-Francois Morissette, Souad Harmand

This paper focuses on the effect of rotation on heat transfer mechanisms in rotating machines with the purpose to improve the understanding of thermal phenomena and cooling of hydrogenerators. Using a simplified scale model equipped with a heated pole, it was possible to measure the temperature…

Applied Thermal Engineering, 2014, 70 (1), pp.153-162. ⟨10.1016/j.applthermaleng.2014.04.048⟩. ⟨hal-03612875⟩

Article dans une revue

Numerical modeling of nonlinearity, plasticity and damage in CFRP-woven composites for crash simulations

Olivier Cousigné, David Moncayo, Daniel Coutellier, Pedro P Camanho, Hakim Naceur

Car manufacturers have to develop lightweight structures to limit the weight-increase induced by the new advanced powertrain systems for hybrid and electrical vehicles. Due to their draping, stiffness, improved ductility and damage tolerance properties woven composites are being increasingly used…

Composite Structures, 2014, 115, pp.75-88. ⟨10.1016/j.compstruct.2014.04.017⟩. ⟨hal-03619842⟩