Investigation of Nonlinear Vibro-Acoustic Wave Modulation Mechanisms in Composite Laminates

Abstract:

This paper investigates the effect of low-frequency vibration and the related temperature field on nonlinear vibro-acoustic wave modulations. Experimental modal analysis was used to find natural frequencies and mode shapes of a composite laminate plate with seeded delamination. Temperature distribution was analyzed with a thermographic camera in the vicinity of damage for the identified vibration modes. These frequencies of these vibration modes were then used for low-frequency excitation in nonlinear acoustic tests. The correlation between the thermal field and the observed wave modulations was analyzed.

• Periodical: Key Engineering Materials (Volumes 569-570)
• Pages: 96-102
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.569-570.96
• Online since: July 2013
• Authors: Łukasz Pieczonka, Wieslaw Jerzy Staszewski, Tadeusz Uhl
• Keywords: Composite, Damage Detection, Damage-Wave Interactions, Nonlinear Acoustics

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