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Influence of oscillation localization on film detachment from a substrate

  • A. K. Abramyan
  • N. M. Bessonov
  • D. A. Indeitsev
  • Yu. A. Mochalova
  • B. N. Semenov
Dedicated to Petr Evgen’Evich Tovstik on the Occasion of His 75th Birthday

Abstract

In modern constructions, thin-layer coats are often used as protecting or strengthening elements. Deformations of such constructions may cause significant stresses on the interface between the base and the coat because of the difference in their physical-mechanical properties, which leads to the destruction or detachment of the cover. Of special interest is strength analysis under dynamical or vibrational impacts because of the possibility of localizing oscillations in a neighborhood of the initial inhomogeneities (such as inclusions, defects, construction elements, etc.).

In this paper, on the example of the detachment of a string from an elastic substrate, the possibility of localizing oscillations on a detachment defect is demonstrated and the effect of this localization on the growth of the detachment zone is analyzed. A simplified setting of the problem is considered. The possibility of localizing oscillations on a detachment defect is demonstrated and an approximate analytical solution is constructed, which takes into account only the first symmetric form of oscillations describing the development of the initial detachment.

A numerical modeling of the problem is performed, and the results of modeling are compared with the approximate analytical solution.

Keywords

Wind Turbine Spectral Problem Oscillation Localization Symmetric Form Exciting Force 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Allerton Press, Inc. 2011

Authors and Affiliations

  • A. K. Abramyan
    • 1
  • N. M. Bessonov
    • 1
  • D. A. Indeitsev
    • 2
  • Yu. A. Mochalova
    • 1
  • B. N. Semenov
    • 2
  1. 1.Institute of Problems of Mechanical EngineeringRussian Academy of SciencesSt. PetersburgRussia
  2. 2.St. Petersburg State UniversitySt. PetersburgRussia

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