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Proceedings Paper

Delamination detection in tapered laminates using embedded ultrasonics
Author(s): Ajay A. Divekar; Anthony J. Vizzini
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Paper Abstract

A study is conducted to determine the possibility of detecting internal delamination in a tapered composite laminate using embedded ultrasonic transmitter and receivers. Sound propagation was modeled in the tapered laminate. Ply interfaces, resin pocket interfaces, absorption losses, delaminations and resin pocket cracks are included in the model. Because of the anisotropic behavior of composite materials, the speed of sound is a function of the orientation of the ray with respect to the fiber direction. This parametric study results in the optimal locations for acoustic receivers and the capability of those receivers to determine the extent of delamination via characterization of the energy versus time plot, also termed as the ultrasonic signature. The results indicate the possibility of a successful non-destructive technique for delamination detection in tapered beams.

Paper Details

Date Published: 1 May 1994
PDF: 8 pages
Proc. SPIE 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation, (1 May 1994); doi: 10.1117/12.173959
Show Author Affiliations
Ajay A. Divekar, Univ. of Maryland/College Park (United States)
Anthony J. Vizzini, Univ. of Maryland/College Park (United States)

Published in SPIE Proceedings Vol. 2191:
Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation
James S. Sirkis, Editor(s)

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