1 May 1994 Delamination detection in tapered laminates using embedded ultrasonics
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ajay A. Divekar, Ajay A. Divekar, Anthony J. Vizzini, Anthony J. Vizzini, "Delamination detection in tapered laminates using embedded ultrasonics", Proc. SPIE 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation, (1 May 1994); doi: 10.1117/12.173959; https://doi.org/10.1117/12.173959

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