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ORBi Open Repository and Bibliography (300.356 recursos)

In may 2007, the ULg's Administrative Board (joined in June 2007 by the FUSAGx) decided to create an institutional repository and defined a strong institutional self-archiving policy to increase the visibility, accessibility and impact of the University's publications (Board's decision). This decision led to the official launch, in November 2008, of the ORBi platform including both the Academic Bibliography and the Institutional Repository of the Wallonia-Europe University Academy.

Engineering, computing & technology => Mechanical engineering

Mostrando recursos 1 - 20 de 35

  1. A stochastic 3-scale method to predict the thermo-elastic behaviors of polycrystalline structures

    Wu, Ling; Lucas, Vincent; Golinval, Jean-Claude; Paquay, Stéphane; Noels, Ludovic
    The purpose of this work is to upscale material uncertainties in the context of thermo-elastic response of polycrystalline structures. The probabilistic behavior of micro-resonators made of polycrystalline materials is evaluated using a stochastic multi-scale approach defined using the following methodology. 1. Stochastic volume elements (SVEs) [1] are defined from Voronoi tessellations using experimental measurements of the grain size, orientation, and surface roughness [2]; 2. Mesoscopic apparent thermo-elastic properties such as elasticity tensor, thermal conductivity tensor, and thermal dilatation tensor are extracted using a coupled homogenization theory [3, 4] applied on the SVE realizations; 3. A stochastic model of the homogenized properties extracted from Voronoi...

  2. Generation of unidirectional composite stochastic volume elements from micro-structural statistical information

    Wu, Ling; Bidaine, Benoit; Major, Zoltan; Nghia Chung, Chi; Noels, Ludovic
    The purpose of this work is to generate Stochastic Volume Element (SVE) of unidirectional composites using statistical information obtained from imaging technique in order to study the effect of the micro-structure uncertainty on the meso-scale behavior. When considering a homogenization-based multiscale approach, the material properties are obtained at each integration point of a macro-structure from the resolution of a micro-scale boundary value problem. When the separation of scales holds, the macro-point is viewed at the micro-level as the center of a Representative Volume Element (RVE). However, for composite materials which suffer from a large scatter in their constituent properties and microstructure, the...

  3. First passage time as an analysis tool in experimental wind engineering [under review]

    Vanvinckenroye, Hélène; Denoël, Vincent; Andrianne, Thomas
    Peer reviewed

  4. Comparison of a dynamic model and experimental results of a residential heat pump with vapor injection and variable speed scroll compressor

    Dechesne, Bertrand; Gendebien, Samuel; Lemort, Vincent; Bertagnolio, Stéphane
    Peer reviewed

  5. RÉSULTATS EXPERIMENTAUX ET MODÉLISATION DYNAMIQUE D’UNE POMPE À CHALEUR AIR-EAU UTILISANT UN COMPRESSEUR SPIRO-ORBITAL À VITESSE VARIABLE ET INJECTION DE VAPEUR

    Dechesne, Bertrand; Gendebien, Samuel; Lemort, Vincent; Bertagnolio, Stéphane
    Peer reviewed

  6. RÉSULTATS EXPERIMENTAUX ET MODÉLISATION DYNAMIQUE D’UNE POMPE À CHALEUR AIR-EAU UTILISANT UN COMPRESSEUR SPIRO-ORBITAL À VITESSE VARIABLE ET INJECTION DE VAPEUR

    Dechesne, Bertrand; Gendebien, Samuel; Lemort, Vincent; Bertagnolio, Stéphane
    Peer reviewed

  7. Experimental investigation and dynamic modeling of an air-to-water residential heat pump with vapor injection and variable speed scroll compressor

    Dechesne, Bertrand; Gendebien, Samuel; Lemort, Vincent; Bertagnolio, Stéphane
    Peer reviewed

  8. Experimental investigation and dynamic modeling of an air-to-water residential heat pump with vapor injection and variable speed scroll compressor

    Dechesne, Bertrand; Gendebien, Samuel; Lemort, Vincent; Bertagnolio, Stéphane
    Peer reviewed

  9. Effect of including a gas layer on the gel formation process during the drying of a polymer solution

    Rabani, Ramin; Machrafi, Hatim; Dauby, Pierre
    Peer reviewed

  10. Fatigue resistant designs using stress-based topology optimization

    Collet, Maxime; Bauduin, Simon; Fernandez Sanchez, Eduardo Felipe; Duysinx, Pierre
    Fatigue is an important mode of failure in mechanical engineering and accounting for it as soon as the early stage of design using topology optimization sounds primordial. Structures undergoing high-cycle fatigue can be described by the stress-based approach and then a stress-based topology optimization framework, which has received great interest since almost 20 years because of the innovative designs that can be achieved to answer strength requirements, can be used. Literature reports many good results for shape optimization [Mrzyglod & Zielinsky(2006)] whereas in the eld of topology optimization several authors have shown that considering fatigue in an optimization framework leads to more relevant solutions where fluctuating loads are...

  11. Topology optimization of mechanical components fabricated by additive manufacturing for a Shell Eco Marathon vehicle

    Alarcon Soto, Pablo
    Since 2004, a team of students and researchers of University of Liege takes part to the Shell Eco Marathon race with a lightweight electric vehicle. The goal of this pedagogical project is to design, fabricate and operate a vehicle exhibiting the least energy consumption. A key factor to reduce the energy consumption is to minimize the vehicle mass. Besides the body structure made of CRFP, engineers have also to focus on the weight reduction of any mechanical parts of the powertrain, transmission and of rolling gear. The combination of topology optimization with additive manufacturing techniques allows to propose innovative designs exhibiting...

  12. Fatigue resistant designs using stress-based topology optimization

    Collet, Maxime; Bauduin, Simon; Fernandez Sanchez, Eduardo Felipe; Duysinx, Pierre
    Stress based topology optimization has received great interest since almost 20 years because of the innovative designs that can be achieved to answer strength requirements. Fatigue is an important mode of failure in mechanical engineering and accounting for it as soon as the early stage of design using topology optimization sounds primordial. Literature reports many good results for shape optimization [Mrzyglod & Zielinsky(2006)] whereas in the field of topology optimization several authors have shown that considering fatigue in an optimization framework leads to more relevant solutions where fluctuating loads are involved [Holmberg E.(2015), Collet et al(2016), Svärd(2015)]. In order to check...

  13. Comparing the mechanical performance of synthetic and natural cellular materials

    Fernandes, F.A.O.; Tomé Jardin, Ruben Antonio; Pereira, A.B.; Alves de Sousa, R.J.
    Peer reviewed

  14. Static and dynamic mechanical response of different cork agglomerates

    Tomé Jardin, Ruben Antonio; Fernandes, F.A.O.; Pereira, A.B.; Alves de Sousa, R.J.
    Peer reviewed

  15. Stochastic multiscale modeling of MEMS stiction failure

    Hoang Truong, Vinh
    In the context of microelectromechanical systems, due to their reduced size, the surface phenomena, e.g. adhesion contact, play an important role in the reliability of the devices. Indeed, the adhesive forces, e.g. capillary and van der Waal forces, can lead to the stiction failure for which the two contacting surfaces can accidentally be stuck together permanently. This is a common failure of MEMS. Because of the comparability between the roughness of the contacting surfaces and the ranges of adhesive stress, the interaction area can be much smaller than the apparent one. Since the contact zone is reduced and becomes comparable with the characteristic length scale of the...

  16. Experimental and numerical investigation of the nonlinear dynamics of compliant mechanisms for deployable structures

    Dewalque, Florence; Schwartz, Cédric; Denoël, Vincent; Croisier, Jean-Louis; FORTHOMME, Bénédicte; Bruls, Olivier
    Peer reviewed

  17. Experimental and numerical investigation of the nonlinear dynamics of compliant mechanisms for deployable structures

    Dewalque, Florence; Schwartz, Cédric; Denoël, Vincent; Croisier, Jean-Louis; FORTHOMME, Bénédicte; Bruls, Olivier
    Peer reviewed

  18. A discontinuous Galerkin method for non-linear electro-thermo-mechanical problems; Application to shape memory composite materials

    Homsi, Lina; Noels, Ludovic
    Peer reviewed

  19. Effect of orthopedic implants on long bone properties : a combined experimental and numerical approach

    Laurent, Cédric; Verwaerde, Jolante; Böhme, Béatrice; Ponthot, Jean-Philippe; Balligand, Marc
    Long bone fracture constitutes a common reason for medical consultation within veterinary orthopedic services (Miller et al. 1998; Kumar et al. 2007). Canine bone fracture repair differs from the human case in the sense that (1) the physiological characteristics and morphology of the injured bones in animals vary considerably (Palierne et al. 2006), (2) the animal is not able to limit its activity during the post-operative period, leading to premature overloading, and (3) the surgeon is confronted to cost limitations concerning orthopedic material. There is a lack of studies assessing the effect of different treatment types on the biomechanical properties...

  20. Nonlinear analysis of compliant deployable structures: modelling, simulation and experimental validation

    Dewalque, Florence
    Compliant mechanisms are flexible components which can store elastic energy when deformed and then passively release it to produce a motion. Their scope of applications encompasses various domains from robotic orthoses to microscopes and grippers. In this work, the developments focus on compliant mechanisms called tape springs used in deployable space structures. Tape springs, due to their autonomous deployment capacity from a compact folded configuration, their high stiffness in the deployed equilibrium state and their simplicity of integration, represent efficient alternatives to common motorised hinges for space applications. Thus, they are currently used to deploy appendices on satellites such as solar...

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