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Nonlocally related PDE systems for one-dimensional nonlinear elastodynamics

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Abstract

Complete dynamical PDE systems of one-dimensional nonlinear elasticity satisfying the principle of material frame indifference are derived in Eulerian and Lagrangian formulations. These systems are considered within the framework of equivalent nonlocally related PDE systems. Consequently, a direct relation between the Euler and Lagrange systems is obtained. Moreover, other equivalent PDE systems nonlocally related to both of these familiar systems are obtained. Point symmetries of three of these nonlocally related PDE systems of nonlinear elasticity are classified with respect to constitutive and loading functions. Consequently, new symmetries are computed that are: nonlocal for the Euler system and local for the Lagrange system; local for the Euler system and nonlocal for the Lagrange system; nonlocal for both the Euler and Lagrange systems. For realistic constitutive functions and boundary conditions, new dynamical solutions are constructed for the Euler system that only arise as symmetry reductions from invariance under nonlocal symmetries.

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Authors and Affiliations

  1. Department of Mathematics, University of British Columbia, Vancouver, Canada, V6T 1Z2

    G. Bluman & A. F. Cheviakov

  2. LEMTA – ENSEM, 2, Avenue de la Foret de Haye, BP 160, 54504, Vandoeuvre les Nancy, Cedex, France

    J.-F. Ganghoffer

Authors
  1. G. Bluman
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  2. A. F. Cheviakov
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  3. J.-F. Ganghoffer
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Correspondence to G. Bluman.

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Bluman, G., Cheviakov, A.F. & Ganghoffer, JF. Nonlocally related PDE systems for one-dimensional nonlinear elastodynamics. J Eng Math 62, 203–221 (2008). https://doi.org/10.1007/s10665-008-9221-7

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  • DOI: https://doi.org/10.1007/s10665-008-9221-7

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