PhD project: The influence of a simple shear deformation on a long wave motion in pre-stressed incompressible elastic layer,

supervisor: Professor Graham Rogerson, Applied Mathematics Group, Keele University, UK.



Motivation

Features of dynamic models

Mathematical methods and dynamic theories

Main results of project

Conferences and summer school

Publications

PhD thesis


Motivation


  • Novel aspects: Long wave models for the layer with pre-stress in a form of finite simple shear.

  • Practical applications: geo-mechanics and bio-mechanics.

  • Key publications

    1. S. Ide, G.C. Beroza, D.R. Shelly,T. Uchide, "A scaling law for slow earthquakes", NATURE, 447 (7140): 76-79 (2007).

    2. D. Manoussaki, E. K. Dimitriadis, and R. S. Chadwick, "Cochlea's Graded Curvature Effect on Low Frequency Waves", Physical review letters, 96, 088701 (2006).

    3. P.H.Segerstad, S. Toll, "Open-cell cellular solids: A constitutive equation for hyperelasticity with deformation induced anisotropy", International Journal of solids and structures, 45(7-8), 1978-1992 (2008).



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    Features of dynamic models

  • Propagation of 2D waves in an incompressible elastic layer subject to primary simple shear deformation.

  • Wave length considerably exceeds the layer thickness= long wave with small parameter scaled wave number.

  • Long wave low and high frequency regimes.

  • Three boundary value problems: layer with free, fixed and one fixed one free face.

  • Very original aspect(!): no analogue of bending and extension motions.

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    Mathematical methods and dynamic theories


  • Various perturbation methods.

  • Long wave low and high frequency regimes.

  • Application of theories of dynamic elasticity: Kirchhoff plate theory, refined Timoshenko-Reissner theory.

  • Asymptotic integration method.

  • Numerical methods to solve non-linear equations: Newton-Rapson and bracketing-bisection method.

  • Key publications

    1. J. D. Kaplunov, L. Y. Kossovich and E. V. Nolde, Dynamics of thin walled elastic bodies, Academic Press (1998).

    2. J. D. Kaplunov, E. V. Nolde and G. A. Rogerson, A low frequency model for dynamic motion w pre-stressed incompressible elastic structures, Proc. R. Soc. Lond., A 456, 2589-2610 (2000).

    3. J. D. Kaplunov, E. V. Nolde and G. A. Rogerson, An asymptotically consistent model for long wave high frequency in a pre-stressed elastic plate, Math Mech Solids, 7, 581-606 (2002).



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    Main results of the project


  • The fundamental modes exist only in the free faces problem.

  • Long wave high frequency: 1D asymptotically consistent models were derived to describe 2D motion in a layer with free, fixed and one fixed one free face.

  • Long wave low frequency: the asymptotically consistent model yields 1D vector governing equation - second time and space derivatives of 2 displacements components, 1 space variable.



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    Conferences and summer school


  • CanCNSM (2008) Canada: 3rd Canadian Conference on Nonlinear Solid Mechanics.

  • BAMC (2008) Manchester, UK : British applied mathematics colloquium.

  • Euromech Colloquium 481 (2007) UK : Edge and surface waves.

  • Brussels Open University (2007) Belgium : Experiments in Space and Beyond.

  • BAMC (2006) Keele, UK : British applied mathematics colloquium.

  • CISM advanced course (2006): Waves in non-linear pre-stressed materials.



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    Publications


  • Formally accepted for publication, to appear

    1.S.R.Amirova and G.A.Rogerson, Feb (2008), JoMMS 071031, ISSN: 1559-3959, Long wave motion, dispersion relation analysis.

    2.S.R.Amirova and G.A.Rogerson, March (2008), Mechanics of Solids, ISSN: 0025-6544, Long wave low frequency asymptotic models in respect to neo-Hookean strain-energy function.

  • In prepation

    1.S.R.Amirova and G.A.Rogerson, Long wave low frequency asymptotic models in respect to most general strain-energy function.

    2. S.R.Amirova and G.A.Rogerson, The asymptotic long wave high frequency models.



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