Lamb wave propagation in composite laminates using a higher-order plate theory

Lei Wang; F. G. Yuan

doi:10.1117/12.716499

19 April 2007 Lamb wave propagation in composite laminates using a higher-order plate theory

Lei Wang, F. G. Yuan

Proceedings Volume 6531, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007; 65310I (2007) https://doi.org/10.1117/12.716499
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

A new consistent higher-order plate theory is developed for composites with the aim of accurately and efficiently modeling multiple higher-order Lamb waves over a higher frequency range. The dispersion relations based on this theory that can be analytically determined comprise five symmetric and six anti-symmetric wave modes. Computational procedures for phase and group velocities are discussed. Meanwhile, characteristic wave curves including velocity, slowness, and wave curves are introduced to investigate the dispersive and anisotropic behavior of Lamb wave propagation in composites. From numerical results of Lamb waves in both lamina and symmetric laminate, it shows that the higher-order plate theory not only gives good agreement with three-dimensional (3-D) elasticity theory over a wide high frequency range, but also provides a more robust method than 3-D elasticity theory. This study demonstrates a feasibility of using the proposed theory for realizing near real-time Structural Health Monitoring for composites at a higher frequency range.

Citation Download Citation

Lei Wang and F. G. Yuan "Lamb wave propagation in composite laminates using a higher-order plate theory", Proc. SPIE 6531, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007, 65310I (19 April 2007); https://doi.org/10.1117/12.716499

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