Propagation characteristics of guided waves in layered elastic orthotropic materials

James A. Sotiropoulos; Sudhakar Nair

doi:10.1117/12.434197

24 July 2001 Propagation characteristics of guided waves in layered elastic orthotropic materials

James A. Sotiropoulos, Sudhakar Nair

Proceedings Volume 4335, Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring; (2001) https://doi.org/10.1117/12.434197
Event: 6th Annual International Symposium on NDE for Health Monitoring and Diagnostics, 2001, Newport Beach, CA, United States

Abstract

The propagation of guided elastic waves in an orthotropic compressible layer imbedded in a difference orthotropic compressible material is examined. The strain energy of the two materials is otherwise arbitrary with the material constants satisfying the strong ellipticity conditions. To extract the propagation characteristics, propagation is considered along a material axis of symmetry which lies in the interfacial plane. For the two materials having common axes of symmetry, the dispersion equation is derived in explicit form. Analysis of the dispersion equation reveals the propagation characteristics and their dependence on frequency and material parameters. Low and high-frequency asymptotes are defined and their existence is discussed, the high frequency asymptote corresponding to a Stoneley wave. For low frequencies, the interfacial wave speed is derived in explicit form yielding a simple material parameter condition for the existence of interfacial waves.

Citation Download Citation

James A. Sotiropoulos and Sudhakar Nair "Propagation characteristics of guided waves in layered elastic orthotropic materials", Proc. SPIE 4335, Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring, (24 July 2001); https://doi.org/10.1117/12.434197

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