Analysis of Vibro-Acoustic Modulations in Nonlinear Acoustics Used for Impact Damage Detection - Numerical and Experimental Study

Abstract:

The paper investigates experimentally the effect of low-frequency vibration on nonlinear vibro-acoustic wave modulations applied to the detection of Barely Visible Impact Damage (BVID) in a composite plate. Finite Element (FE) modeling was used in a pretest stage to identify different motion scenarios of delaminated surfaces and relate them to natural frequencies of the damaged plate. In particular the opening-closing and frictional sliding actions of the defected interfaces have been considered. Subsequently, the identified frequencies have been used for low frequency excitation in nonlinear acoustic experiments on a composite plate with impact damage.

• Periodical: Key Engineering Materials (Volume 558)
• Pages: 341-348
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.558.341
• Online since: June 2013
• Authors: Łukasz Pieczonka, Andrzej Klepka, Wieslaw Jerzy Staszewski, Tadeusz Uhl, Francesco Aymerich
• Keywords: Composite, Impact Damage Detection, Nonlinear Acoustics, Vibro-Acoustic Modulation

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