The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform

H Zahouani - One of the best experts on this subject based on the ideXlab platform.

  • tribological behavior of thermoplastic polyurethane elastomers
    Materials & Design, 2007
    Co-Authors: Riadh Elleuch, K Elleuch, Boudour Salah, H Zahouani
    Abstract:

    Abstract This study is concerned with the thermoplastic polyurethane elastomers (TPU) in the form of capsules used for handling in textile industry applications. The analysis of static mechanical characteristics constitutes an interesting tool for understanding the tribological behavior of TPU in sliding contact. In order to study such behavior, experiments are conducted using indentation tests with spherical steel indenter for the purpose of determining the material characterization as elastic modulus and adhesion force ( E ,  F ad ) and evaluating the viscoelastic behavior of TPU. Comparison of experimental results obtained from indentation tests with analytical simulations based on Hertz Theory confirms that Hertz Theory can be used to model the indentation for load condition lower than the plastic flow load of TPU. This zone is governed by elastic behavior. Friction steel-TPU tests are conducted in order to quantify the monotonous and cyclic friction phenomena. Damage of TPU manifested by wear scars and wear particles are characterized after a short number of friction cycles. A close correlation between friction and wear was found. In fact, at low normal load ( F n F n  > 1 N, the friction decrease is induced by wear particles. The analysis developed in this paper confirms a good wear resistance of the TPU at real loading condition even for high numbers of cycles.

  • Tribological behavior of thermoplastic polyurethane elastomers
    Materials & Design, 2007
    Co-Authors: Riadh Elleuch, K Elleuch, Boudour Salah, H Zahouani
    Abstract:

    Abstract This study is concerned with the thermoplastic polyurethane elastomers (TPU) in the form of capsules used for handling in textile industry applications. The analysis of static mechanical characteristics constitutes an interesting tool for understanding the tribological behavior of TPU in sliding contact. In order to study such behavior, experiments are conducted using indentation tests with spherical steel indenter for the purpose of determining the material characterization as elastic modulus and adhesion force ( E ,  F ad ) and evaluating the viscoelastic behavior of TPU. Comparison of experimental results obtained from indentation tests with analytical simulations based on Hertz Theory confirms that Hertz Theory can be used to model the indentation for load condition lower than the plastic flow load of TPU. This zone is governed by elastic behavior. Friction steel-TPU tests are conducted in order to quantify the monotonous and cyclic friction phenomena. Damage of TPU manifested by wear scars and wear particles are characterized after a short number of friction cycles. A close correlation between friction and wear was found. In fact, at low normal load ( F n F n  > 1 N, the friction decrease is induced by wear particles. The analysis developed in this paper confirms a good wear resistance of the TPU at real loading condition even for high numbers of cycles.

Riadh Elleuch - One of the best experts on this subject based on the ideXlab platform.

  • tribological behavior of thermoplastic polyurethane elastomers
    Materials & Design, 2007
    Co-Authors: Riadh Elleuch, K Elleuch, Boudour Salah, H Zahouani
    Abstract:

    Abstract This study is concerned with the thermoplastic polyurethane elastomers (TPU) in the form of capsules used for handling in textile industry applications. The analysis of static mechanical characteristics constitutes an interesting tool for understanding the tribological behavior of TPU in sliding contact. In order to study such behavior, experiments are conducted using indentation tests with spherical steel indenter for the purpose of determining the material characterization as elastic modulus and adhesion force ( E ,  F ad ) and evaluating the viscoelastic behavior of TPU. Comparison of experimental results obtained from indentation tests with analytical simulations based on Hertz Theory confirms that Hertz Theory can be used to model the indentation for load condition lower than the plastic flow load of TPU. This zone is governed by elastic behavior. Friction steel-TPU tests are conducted in order to quantify the monotonous and cyclic friction phenomena. Damage of TPU manifested by wear scars and wear particles are characterized after a short number of friction cycles. A close correlation between friction and wear was found. In fact, at low normal load ( F n F n  > 1 N, the friction decrease is induced by wear particles. The analysis developed in this paper confirms a good wear resistance of the TPU at real loading condition even for high numbers of cycles.

  • Tribological behavior of thermoplastic polyurethane elastomers
    Materials & Design, 2007
    Co-Authors: Riadh Elleuch, K Elleuch, Boudour Salah, H Zahouani
    Abstract:

    Abstract This study is concerned with the thermoplastic polyurethane elastomers (TPU) in the form of capsules used for handling in textile industry applications. The analysis of static mechanical characteristics constitutes an interesting tool for understanding the tribological behavior of TPU in sliding contact. In order to study such behavior, experiments are conducted using indentation tests with spherical steel indenter for the purpose of determining the material characterization as elastic modulus and adhesion force ( E ,  F ad ) and evaluating the viscoelastic behavior of TPU. Comparison of experimental results obtained from indentation tests with analytical simulations based on Hertz Theory confirms that Hertz Theory can be used to model the indentation for load condition lower than the plastic flow load of TPU. This zone is governed by elastic behavior. Friction steel-TPU tests are conducted in order to quantify the monotonous and cyclic friction phenomena. Damage of TPU manifested by wear scars and wear particles are characterized after a short number of friction cycles. A close correlation between friction and wear was found. In fact, at low normal load ( F n F n  > 1 N, the friction decrease is induced by wear particles. The analysis developed in this paper confirms a good wear resistance of the TPU at real loading condition even for high numbers of cycles.

Jia-yang Juang - One of the best experts on this subject based on the ideXlab platform.

  • Hertzian load displacement relation holds for spherical indentation on soft elastic solids undergoing large deformations
    Tribology International, 2016
    Co-Authors: Keng-hui Lin, Jia-yang Juang
    Abstract:

    Abstract In this paper we investigate the validity of the Hertz Theory at very large deformations by performing rigid spherical indentation on soft, linearly elastic silicone substrates using nanoindentation tests and finite element method. We show that the Theory significantly underestimates and overestimates the contact radius and maximum contact pressure, respectively, as the ratio of indenter displacement δ to the indenter radius R exceeds 0.1. However, the loading load–displacement relation still holds ( 10. Our results may provide practical guidelines to proper sample preparation and better interpretation of indentation data of elastic soft elastomers and gels.

  • Hertzian load–displacement relation holds for spherical indentation on soft elastic solids undergoing large deformations
    Tribology International, 2016
    Co-Authors: Keng-hui Lin, Jia-yang Juang
    Abstract:

    Abstract In this paper we investigate the validity of the Hertz Theory at very large deformations by performing rigid spherical indentation on soft, linearly elastic silicone substrates using nanoindentation tests and finite element method. We show that the Theory significantly underestimates and overestimates the contact radius and maximum contact pressure, respectively, as the ratio of indenter displacement δ to the indenter radius R exceeds 0.1. However, the loading load–displacement relation still holds ( 10. Our results may provide practical guidelines to proper sample preparation and better interpretation of indentation data of elastic soft elastomers and gels.

Xuesong Jin - One of the best experts on this subject based on the ideXlab platform.

  • Effects of wheel???rail contact modelling on wheel wear simulation
    Wear, 2016
    Co-Authors: Gongquan Tao, Zefeng Wen, Xujing Zhao, X S Jin, Xin Zhao, Xuesong Jin
    Abstract:

    Three non-elliptic contact models, namely Kik???Piotrowski method, STRIPES and ANALYN, are first compared to the Hertz Theory and the CONTACT code in terms of the normal contact solution. Further, for the contact models except for CONTACT, the tangential contact solutions are calculated by a modified simplified Theory of Kalker (FASTSIM) based on the normal ones to compare with that of CONTACT. Afterwards, a wheel wear prediction model, consisting of a multi-body dynamic model of the railway vehicle, a wheel???rail contact model and a wear function developed by the University of Sheffield, is developed. The influences of the five contact models mentioned above on the wheel wear prediction are investigated from viewpoints of calculation efficiency and accuracy. The results indicate that using Hertz Theory and FASTSIM to solve the normal and tangential contact problem, respectively, in the wheel wear simulation is a good choice in order to consider a compromise between the calculation efficiency and accuracy.

Boudour Salah - One of the best experts on this subject based on the ideXlab platform.

  • tribological behavior of thermoplastic polyurethane elastomers
    Materials & Design, 2007
    Co-Authors: Riadh Elleuch, K Elleuch, Boudour Salah, H Zahouani
    Abstract:

    Abstract This study is concerned with the thermoplastic polyurethane elastomers (TPU) in the form of capsules used for handling in textile industry applications. The analysis of static mechanical characteristics constitutes an interesting tool for understanding the tribological behavior of TPU in sliding contact. In order to study such behavior, experiments are conducted using indentation tests with spherical steel indenter for the purpose of determining the material characterization as elastic modulus and adhesion force ( E ,  F ad ) and evaluating the viscoelastic behavior of TPU. Comparison of experimental results obtained from indentation tests with analytical simulations based on Hertz Theory confirms that Hertz Theory can be used to model the indentation for load condition lower than the plastic flow load of TPU. This zone is governed by elastic behavior. Friction steel-TPU tests are conducted in order to quantify the monotonous and cyclic friction phenomena. Damage of TPU manifested by wear scars and wear particles are characterized after a short number of friction cycles. A close correlation between friction and wear was found. In fact, at low normal load ( F n F n  > 1 N, the friction decrease is induced by wear particles. The analysis developed in this paper confirms a good wear resistance of the TPU at real loading condition even for high numbers of cycles.

  • Tribological behavior of thermoplastic polyurethane elastomers
    Materials & Design, 2007
    Co-Authors: Riadh Elleuch, K Elleuch, Boudour Salah, H Zahouani
    Abstract:

    Abstract This study is concerned with the thermoplastic polyurethane elastomers (TPU) in the form of capsules used for handling in textile industry applications. The analysis of static mechanical characteristics constitutes an interesting tool for understanding the tribological behavior of TPU in sliding contact. In order to study such behavior, experiments are conducted using indentation tests with spherical steel indenter for the purpose of determining the material characterization as elastic modulus and adhesion force ( E ,  F ad ) and evaluating the viscoelastic behavior of TPU. Comparison of experimental results obtained from indentation tests with analytical simulations based on Hertz Theory confirms that Hertz Theory can be used to model the indentation for load condition lower than the plastic flow load of TPU. This zone is governed by elastic behavior. Friction steel-TPU tests are conducted in order to quantify the monotonous and cyclic friction phenomena. Damage of TPU manifested by wear scars and wear particles are characterized after a short number of friction cycles. A close correlation between friction and wear was found. In fact, at low normal load ( F n F n  > 1 N, the friction decrease is induced by wear particles. The analysis developed in this paper confirms a good wear resistance of the TPU at real loading condition even for high numbers of cycles.