ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06

5pUW6. Acoustic wave scattering from infinite cylindrical clad rods.

Farhang Honarvar

Dept. of Mech. Eng., Univ. of Toronto, Toronto, Ontario M5S 1A4, Canada

Anthony N. Sinclair

Univ. of Toronto, Toronto, Ontario M5S 1A4, Canada

This paper considers the scattering of an infinite plane acoustic wave obliquely incident on an infinite clad rod. Comparing the form functions of the scattered pressure for the clad rod and a simple rod made of the cladding material, it is observed that the presence of the core will affect the lower mode resonances while the higher modes are not affected. The ratio a/b, where a and b are the radii of the core and the clad rod, respectively, is an indication of the boundary between the lower and higher modes. Additional resonances for this case are due to the surface waves propagating on the core/cladding interface. These resonances are highly dependent on the quality of the bond between the core and the cladding. Hence they could be used as key parameters in evaluation of the interfacial bond quality. A finite value of bond rigidity is used in order to model the core/cladding boundary. Using this approach the quality of the interfacial bond in the model can range for perfect bonding to complete debond depending on the values of the boundary stiffness constants.