Nonlinear Acoustics uses different types of nonlinear phenomena to detect structural damage. One of the major difficulties associated with this technique is the fact that nonlinearities can be produced not only by damage but also by various intrinsic effects such as material behaviour and/or structural boundary conditions. The paper investigates the effect of boundary conditions on Nonlinear Acoustics used for damage detection. A simple composite plate with impact damage is investigated. The plate is clamped using various force levels. The experimental study focuses on the effect of clamping force on vibro-acoustic interaction. The results demonstrate the importance of the effect of boundary conditions when nonlinear acoustics is used for impact damage detection.

Date Published: 8 April 2010
PDF: 10 pages
Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems 2010, 765031 (8 April 2010); doi: 10.1117/12.847516

Published in SPIE Proceedings Vol. 7650:
Health Monitoring of Structural and Biological Systems 2010
Tribikram Kundu, Editor(s)