论文信息 - In-Situ Damage Detection of Composites Structures using Lamb Wave Methods

In-Situ Damage Detection of Composites Structures using Lamb Wave Methods

ABSTRACT * Cost-effective and reliable damage detection is critical for the utilization of composite materials. This paper describes part of an experimental and analytical survey of candidate methods for in-situ damage detection of composite materials. Optimal piezoceramic actuator geometry and driving parameters were developed from the Lamb wave equations. Results are then presented for the application of this Lamb wave technique to graphite/epoxy specimens containing representative damage modes. Linear wave scans were performed on narrow laminated specimen, sandwich beams, and built-up structures such as composite plates with stiffeners and a cylinder. Lamb wave techniques have been proven to provide more information about damage type, severity and location than previously tested methods (frequency response techniques), and may prove suitable for structural health monitoring applications since they travel long distances and can be applied with conformable piezoelectric actuators and sensors that require little power.

S. Spearing | S. Kessler | M. Atalla

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