An explicit secular equation of Rayleigh waves propagating along an obliquely cut surface in a directional fiber-reinforced composite

Authors

  • Pham Chi Vinh Hanoi University of Science, VNU
  • Nguyen Thi Khanh Linh Water Resources University of Vietnam

DOI:

https://doi.org/10.15625/0866-7136/34/2/927

Keywords:

Fibres, mechanical properties, anisotropy, non-destructive testing, Rayleigh waves

Abstract

The propagation of Rayleigh waves along an obliquely cut surface in a directional fiber-reinforced composite was studied recently by Ohyoshi [Ohyoshi T. Compos Sci Technol  2000; 60; 2191-6]. The author derived the secular equation of the wave, however, it is still implicit. In this paper, a fully explicit secular equation of the wave is obtained by using the method of first integrals. From it we immediately arrive at the secular equation of the wave for the case when the cut surface is parallel to the fiber direction. This secular equation is much more simple than the ones obtained recently by Cerv [Cerv J. Int Rev Mech Eng (IREME) 2008; 2; 762-72] and Cerv et al. [Cerv J et al. Composite Structures 2010; 92; 568-77]. Based on the obtained secular equations some approximate formulas for the velocity of Rayleigh waves are established and it is shown that they are good approximations. The explicit secular equations and the approximate formulas for the velocity derived in this paper are useful  for analyzing the effect of the material properties and the  orientation of the  fiber direction on the Rayleigh wave velocity, especially they are  powerful tools for solving the inverse problem: determining the  material parameters from the measured values of the velocity.

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Published

30-05-2012

How to Cite

Vinh, P. C., & Khanh Linh, N. T. (2012). An explicit secular equation of Rayleigh waves propagating along an obliquely cut surface in a directional fiber-reinforced composite. Vietnam Journal of Mechanics, 34(2), 123–134. https://doi.org/10.15625/0866-7136/34/2/927

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