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Browsing SOE - Scholarly Publications by Issue Date

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Browsing SOE - Scholarly Publications by Issue Date

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  • Full Film, Boundary Lubrication and Tribochemistry in Steel Circular Contacts Lubricated with Glycerol 
    Habchi, Wassim; De Barros, M.I.; Joly-Pottuz, L.; Matta, C.; Martin, J.M.; Vergne, P.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    In this article, the lubricating properties of pure glycerol are investigated under both mild and severe EHL regimes. Amazingly low friction coefficients (about 0.01) are reported by experiments in thick film regimes ...
  • A numerical model for the solution of thermal elastohydrodynamic lubrication in coated circular contacts 
    Habchi, Wassim; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    This paper presents a finite element model for the solution of thermal elastohydrodynamic lubrication in coated circular contacts. The model is based on a full-system finite element resolution of the elastohydrodynamic and ...
  • Numerical Investigation of the Use of Machinery Low-Viscosity Working Fluids as Lubricants in Elastohydrodynamic Lubricated Point Contacts 
    Habchi, Wassim; Vergne, P.; Eyheramendy, D.; Morales-Espejel, G. E.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    This study proposes a numerical investigation of the potential use of machinery working fluids as lubricants in contacts operating under an elastohydrodynamic regime. These fluids are usually of very low viscosity and ...
  • Fast and Reduced Full-System Finite Element Solution of EHL Problems 
    Habchi, Wassim; Issa, J.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    This paper presents a reduced full-system finite element solution of elastohydrodynamic lubrication (EHL) problems. It aims to demonstrate the feasibility of this approach by applying it to the simple isothermal Newtonian ...
  • A Numerical Investigation of Local Effects on the Global Behavior of TEHD Highly Loaded Circular Contacts 
    Habchi, Wassim; Vergne, P.; Bair, S.; Fillot, N.; Morales-Espejel, G. E.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    This paper presents a numerical investigation of the local behavior of highly loaded thermal elastohydrodynamic contacts. The study is a continuation to a previous work of the authors where it was found that neglecting the ...
  • On friction regimes in quantitative elastohydrodynamics 
    Habchi, Wassim; Bair, S.; Vergne, P.; SOE; Mechanical Engineering; 200804200; wassim.habchi@lau.edu.lb (2015-09-21)
    This paper identifies the different friction regimes encountered in elastohydrodynamic lubricated point contacts using a quantitative, physics-based approach. The idea is to link different traction regimes to dimensionless ...
  • A Film Thickness Correction Formula for Double- Newtonian Shear-Thinning in Rolling EHL Circular Contacts 
    Habchi, Wassim; Bair, S.; Qureshi, F.; Covitch, M.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    Lubricants which contain a polymeric thickener will often display a second Newtonian plateau in measured flow curves. Like other manifestations of shear-dependent viscosity, this shear response will lead to an inaccurate ...
  • High surface area electrodes in ionic polymer transducers 
    Akle, Barbar J.; Habchi, Wassim; Wallmersperger, Thomas; Akle, Etienne J.; Leo, Donald J.; SOE; 200700940; 200804200; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb; wassim.habchi@lau.edu.lb (2015-09-21)
    Ionomeric polymertransducer (IPT) is an electroactive polymer that has received considerable attention due to its ability to generate large bending strain (>5%) and moderate stress at low applied voltages (±2 V). Ionic ...
  • Influence of Pressure and Temperature Dependence of Thermal Properties of a Lubricant on the Behavior of Circular TEHD Contacts 
    Habchi, Wassim; Vergne, P.; Bair, S.; Andersson, O.; Eyheramendy, D.; Morales-Espejel, G. E.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    The aim of this paper is to study the effects of pressure and temperature dependence of a conventional lubricant's thermal properties on the behaviour of heavily loaded thermal elastohydrodynamic lubrication (TEHL) contacts. ...
  • Stabilized Fully-Coupled Finite Elements for Elastohydrodynamic Lubrication Problems 
    Habchi, Wassim; Eyheramendy, D.; Vergne, P.; Morales-Espejel, G.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    This work presents a model for elastohydrodynamic (EHD) lubrication problems. A finite element full-system approach is employed. The hydrodynamic and elastic problems are solved simultaneously which leads to fast convergence ...
  • Quantitative Compressibility Effects in Thermal Elastohydrodynamic Circular Contacts 
    Habchi, Wassim; Bair, S.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-21)
    This paper investigates the effects of lubricant compressibility on the film-forming performance of thermal elastohydrodynamic lubricated (EHL) circular contacts. Numerical film thickness predictions using the classical ...
  • A numerical study of friction in isothermal EHD rolling-sliding sphere-plane contacts with spinning 
    Habchi, W.; Dormois, H.; Fillot, N.; Dalmaz, G.; Vergne, P.; Morales-Espejel, G. E.; Ioannides, E.; SOE; 200804200; Industrial And Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-28)
    This paper presents a study of the spinning influence on film thickness and friction in EHL circular contacts under isothermal and fully flooded conditions. Pressure and film thickness profiles are computed with an original ...
  • A Full-System Approach of the Elastohydrodynamic Line/Point Contact Problem 
    Habchi, Wassim; Eyheramendy, D.; Vergne, P.; Morales-Espejel, G. E.; SOE; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-28)
    The solution of the elastohydrodynamic lubrication (EHL) problem involves the simultaneous resolution of the hydrodynamic (Reynolds equation) and elastic problems (elastic deformation of the contacting surfaces). Up to ...
  • A Finite Element Approach of Thin Film Lubrication in Circular EHD Contacts 
    Habchi, Wassim; Demirci, I.; Eyheramendy, D.; Morales-Espejel, G. E.; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-28)
    So far, most of the numerical studies concerning elastohydrodynamic point contact lubrication have been realized using finite differences. This paper describes a finite element approach for the modelling of both, thick and ...
  • Thermal Elastohydrodynamic Lubrication of Point Contacts Using a Newtonian/Generalized Newtonian Lubricant 
    Habchi, Wassim; SOE; 200804200; Mechanical Engineering; wassim.habchi@lau.edu.lb (2015-09-28)
    The classical ElastoHydroDynamic (EHD) theory assumes a Newtonian lubricant and an isothermal operating regime. In reality, lubricating oils do not behave as perfect Newtonian fluids. Moreover, in most operating conditions ...
  • Resistance Factors for Use in Load and Resistance Factor Design of Driven Pipe Piles in Sands 
    Abou-Jaoude, Grace; Foye, K.C.; Prezzi, M.; Salgado, R.; SOE; 200702670; grace.aboujaoude@lau.edu.lb; Civil Engineering (2015-10-30)
    Load and resistance factor design of foundations is done in the offshore industry and is now being done in bridge projects in the United States. Common methods used to establish resistance factors include calibration to ...
  • Strain response of hot-mix asphalt overlays in jointed plain concrete pavements due to reflective cracking 
    Abou-Jaoude, Grace; Ghauch, Z.G.; SOE; 200702670; Civil Engineering; grace.aboujaoude@lau.edu.lb (2015-10-30)
    Reflective cracks appear in asphalt overlays placed on top of a concrete pavement above the locations of joints and cracks in the concrete slab. This paper presents the results of a finite element study on the response ...
  • Computational modeling of flow over an ogee spillway 
    Chatila, Jean; Tabbara, Mazen; SOE; 199690300; 199890270; Civil Engineering; jchatila@lau.edu.lb; mtabbara@lau.edu.lb (2016-02-03)
    This paper presents an investigation into the hydraulics of regular ogee-profile spillways. The free-surfaces of the fluid for several flow heads as measured in the hydraulics laboratory are used as benchmarks. The finite ...
  • Reclaimed Waste Water in Some Middle Eastern Countries 
    Chatila, Jean G.; SOE; 199690300; Civil Engineering; jchatila@lau.edu.lb (2016-02-03)
    Countries of the Middle East are increasingly suffering from shortages and mismanagement of water, a commodity that is becoming of considerable value since water demands are fast approaching the limits of availability. ...
  • Stepped Spillway as an Energy Dissipater 
    Chatila, Jean G.; Jurdi, Bassam R.; SOE; 199690300; Civil Engineering; jchatila@lau.edu.lb (2016-02-03)
    This paper describes an experimental investigation into the hydraulics of ogee-profile stepped spillways, examines their viability as an alternative to smooth-back spillways and investigates their efficiency in reducing ...

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