Abstract
Guided wave propagation in composite pipe has multi-modal and dispersive characteristics. In this paper, guided wave propagation in composite pipe is solved by a semi-analytical finite element (SAFE) method. The theoretical framework is formulated using finite element method (FEM) to describe the displacement fields in the waveguide cross-section, while displacement fields in the wave propagation direction are assumed analytical solutions. The dispersive solutions are obtained in terms of phase velocity and group velocity. Knowledge of guided wave propagation properties in composite pipe is beneficial for practical nondestructive testing and structural health monitoring. The SAFE method is validated by comparison with numerical results by ABAQUS. Also, experimental results from group velocity measurement on a composite pipe are presented, showing the feasibility of this SAFE method.
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