Dispersion of waves in coated poroelastic circular cylinders

• Autorzy: Shah S. A. , Tajuddin M.
• Języki publikacji: EN

Abstrakty

EN

The phenomenon of crack initiation due to dynamic contact loading is referred to as fretting fatigue. This situation is commonly encountered in mechanical couplings subjected to vibration. Whenever a material has good mechanical properties but poor fretting resistance it is advantageous to provide a layer of material having good fretting resistance instead of changing the entire material. This extra layer of material can be provided by coating or by any other surface treatment methods. Wave propagation in coated poroelastic cylinders of infinite extent is investigated employing Biot's theory. The coated poroelastic cylinder consists of two poroelastic cylinders of different poroelastic materials bonded at the curved surface such that the liquids in the poroelastic materials are immiscible. Frequency equations of coated poroelastic cylinders are derived both for pervious and impervious surfaces. Let the infinite coated poroelastic cylinder be homogeneous and isotropic and the outer boundary is free from stress. At the interface of the core and coating, the stresses and displacements are continuous. For motions having infinite wavelength or when the wavenumber is zero, the axial shear and radial modes of the coated poroelastic cylinder are uncoupled each for a pervious and an impervious surface. The frequency equation of axial shear vibrations is same for pervious and impervious surfaces. Non-dimensional phase velocity for propagating modes is computed as a function of propagation constant in the absence of dissipation. The results are presented graphically for two types of coated poroelastic cylinders and then discussed.

Słowa kluczowe

EN

Biot's theory; coated poroelastic cylinder; pervious and impervious surfaces; axial shear and radial modes; propagation constant; phase velocity

PL

teoria Biota; powierzchnia przepuszczalna; stała propagacji; prędkość fazy

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2012
• Tom: Vol. 17, no. 1
• Strony: 213--231
• Opis fizyczny: Bibliogr. 19 poz., tab., wykr.

Twórcy

autor

Shah S. A.

autor

Tajuddin M.

• Department of Mathematics Deccan College of Engineering and Technology Hyderabad-500 001 (A.P) INDIA,

Bibliografia

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