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Fractional Derivative Viscoelastic Model for the Analysis of Two Colliding Spherical Shells

[+] Author Affiliations
Yury A. Rossikhin, Marina V. Shitikova

Voronezh State University of Architecture and Civil Engineering, Voronezh, Russia

Paper No. IMECE2012-87346, pp. 21-32; 12 pages
doi:10.1115/IMECE2012-87346
From:
  • ASME 2012 International Mechanical Engineering Congress and Exposition
  • Volume 12: Vibration, Acoustics and Wave Propagation
  • Houston, Texas, USA, November 9–15, 2012
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4528-8
  • Copyright © 2012 by ASME

abstract

The collision of two isotropic spherical shells is investigated for the case when the viscoelastic features of the shells represent themselves only in the place of contact and are governed by the standard linear solid model with fractional derivatives. Thus, the problem concerns the shock interaction of two shells, wherein the generalized fractional-derivative standard linear law instead of the Hertz contact law is employed as a low of interaction. The pans of the shells beyond the contact domain are assumed to be elastic, and their behavior is described by the equations of motion which take rotary inertia and shear deformations into account. The model developed here suggests that after the moment of impact quasi-longitudinal and quasi-transverse shock waves are generated, which then propagate along the spherical shells. Due to the short duration of contact interaction, the reflected waves are not taken into account. The solution behind the wave fronts is constructed with the help of the theory of discontinuities. To determine the desired values behind the wave fronts, one-term ray expansions are used, as well as the equations of motion of the contact domains for the both spherical shells.

Copyright © 2012 by ASME

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