Development of Guided Wave Ultrasonic Inspection Method for Thick Composite Structures

Abstract:

Ultrasonic Non-destructive testing is a well known technique for inspecting fiber reinforced composite structures however; its capability is severely limited by the high attenuation in thick and multi layer structures. Guided wave ultrasonic inspection has been reported to be useful tool for quantitative identification of composite structures. It takes advantage of tailoring / generating desired ultrasonic wave modes (Symmetric and anti-symmetric) for improved transmission through the composite structure. For this, guided waves have to be generated selectively by precisely placing transducer at an angle to the test surface. Automation of two axis fixture for transmission and reception of transducers have to be used for avoiding manual errors. The captured signals have to be processed in order to extract useful information from the received ultrasonic signals. The proposed project aims at developing automated guided wave inspection methods along with digital signal processing for generating dispersion curves for thick composited. Using test laminates with implanted defects, methodology for thick composite inspection with guided wave ultrasonic’s will be established. For this data will be captured and analyzed using Labview software.

• Periodical: Applied Mechanics and Materials (Volumes 592-594)
• Pages: 153-157
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.592-594.153
• Online since: July 2014
• Authors: U. Saikrishna*, K. Srinivas, Y.L.V.D. Prasad
• Keywords: Composite Material, Guided Waves, LabVIEW, N.D.E, Ultrasonics

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