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Contact Mechanics and Coefficients of Restitution

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Granular Gases

Part of the book series: Lecture Notes in Physics ((LNP,volume 564))

Abstract

We assume that the energy dissipated during collisions between solid bodies is due to plastic deformation at the contact. The normal and tangential interactions between elastic and elastic-perfectly plastic spheres are discussed. For elastic-perfectly plastic spheres an analytical solution for the normal coefficient of resitution is presented which is velocity dependent. The predicted rebound kinematics for oblique impacts of elastic spheres are shown to be in excellent agreement with experimentaldata. Comparisons between predictions and experimentaldata for oblique impacts of elastoplastic spheres are only in agreement if sliding occurs throughout the impact duration.

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© 2001 Springer-Verlag Berlin Heidelberg

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Thornton, C., Ning, Z., Chuan-yu, W., Nasrullah, M., Long-yuan, L. (2001). Contact Mechanics and Coefficients of Restitution. In: Pöschel, T., Luding, S. (eds) Granular Gases. Lecture Notes in Physics, vol 564. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44506-4_9

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  • DOI: https://doi.org/10.1007/3-540-44506-4_9

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-41458-2

  • Online ISBN: 978-3-540-44506-7

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