Effect of boundary conditions on nonlinear acoustics used for impact damage detection in composite structures

2010 ◽  
Author(s):  
Francesco Aymerich ◽  
Wieslaw J. Staszewski ◽  
Tadeusz Uhl
Keyword(s):  
Boundary Conditions ◽  
Damage Detection ◽  
Composite Structures ◽  
Impact Damage ◽  
Nonlinear Acoustics

Feasibility of PZT ceramics for impact damage detection in composite structures

2015 ◽  
Author(s):  
Gerges Dib ◽  
Ermias Koricho ◽  
Oleksii Karpenko ◽  
Mahmood Haq ◽  
Lalita Udpa ◽  
...  
Keyword(s):  
Damage Detection ◽  
Composite Structures ◽  
Impact Damage ◽  
Pzt Ceramics

scholarly journals A transmittance-based methodology for damage detection under uncertainty: An application to a set of composite beams with manufacturing variability subject to impact damage and varying operating conditions

2018 ◽  
Vol 18 (1) ◽  
pp. 318-333 ◽  
Author(s):  
Aggelos G Poulimenos ◽  
John S Sakellariou
Keyword(s):  
Damage Detection ◽  
Production Line ◽  
Composite Structures ◽  
Impact Damage ◽  
Parametric Representation ◽  
Composite Beams ◽  
Operating Conditions ◽  
Ratio Test ◽  
Detection Characteristic ◽  
Testing Procedures

Oftentimes, the complexity in manufacturing composite materials leads to corresponding structures which although they may have the same design specifications they are not identical. Thus, composite parts manufactured in the same production line present differences in their dynamics which combined with additional uncertainties due to different operating conditions may lead to the complete concealment of effects caused by small, incipient, damages making their detection highly challenging. This damage detection problem in nominally identical composite structures is pursued in this study through a novel data-based response-only methodology that is founded on the autoregressive with exogenous (ARX) excitation parametric representation of the transmittance function between vibration measurements at two different locations on the structure. This is a statistical time series methodology within which two schemes are formulated. In the first, a single-reference transmittance model representing the healthy structure is employed, while multiple transmittance models from a sample of available healthy structures are used in the second. The model residual signal constitutes for both schemes the damage detection characteristic quantity that is used in appropriate hypothesis testing procedures with the likelihood ratio test. The methodology is experimentally assessed via damage detection for a population of composite beams which are manufactured in the same production line representing the half of the tail of a twin-boom unmanned aerial vehicle. The damage detection results demonstrate the superiority of the multiple transmittance models based scheme that may effectively detect damages under significant manufacturing variability and varying boundary conditions.

Signal processing for passive impact damage detection in composite structures

2001 ◽  
Author(s):  
Pietro Pedemonte ◽  
Wieslaw J. Staszewski ◽  
Francesco Aymerich ◽  
Mike S. Found ◽  
Pierluigi Priolo
Keyword(s):  
Signal Processing ◽  
Damage Detection ◽  
Composite Structures ◽  
Impact Damage

SmartComposite system for impact damage detection on composite structures

2009 ◽  
Author(s):  
Xinlin P. Qing ◽  
Shawn J. Beard ◽  
Jerome Pinsonnault ◽  
Sourav Banerjee
Keyword(s):  
Damage Detection ◽  
Composite Structures ◽  
Impact Damage

Impact Damage Detection in Composite Structures Using Passive Acousto-Ultrasonic Sensors

2001 ◽  
Vol 221-222 ◽  
pp. 389-400 ◽  
Author(s):  
W.J. Staszewski ◽  
C. Biemans ◽  
C. Boller ◽  
Geoffrey R. Tomlinson
Keyword(s):  
Damage Detection ◽  
Composite Structures ◽  
Impact Damage ◽  
Ultrasonic Sensors

Impact Damage Detection in Composite Chiral Sandwich Panels

2012 ◽  
Vol 518 ◽  
pp. 160-167 ◽  
Author(s):  
Andrzej Klepka ◽  
Wieslaw Jerzy Staszewski ◽  
T. Uhl ◽  
Dario di Maio ◽  
Fabrizio Scarpa ◽  
...  
Keyword(s):  
Damage Detection ◽  
Ultrasonic Wave ◽  
High Frequency ◽  
Impact Damage ◽  
Low Frequency ◽  
Nonlinear Acoustics ◽  
Composite Panel ◽  
Chiral Structures ◽  
Low Frequency Vibration ◽  
Vibration Wave

This paper demonstrates impact damage detection in a composite sandwich panel. The panel is built from a chiral honeycomb and two composite skins. Chiral structures are a subset of auxetic solids exhibiting counterintuitive deformation mechanism and rotative but not reflective symmetry. Damage detection is performed using nonlinear acoustics,involves combined vibro-acoustic interaction of high-frequency ultrasonic wave and low-frequency vibration excitation. High-and low-frequency excitations are introduced to the panel using a low-profile piezoceramic transducer and an electromagnetic shaker, respectively. Vibro-acoustic modulated responses are measured using laser vibrometry. The methods used for impact damage detection clearly reveal de-bonding in the composite panel. The high-frequency weak ultrasonic wave is also modulated by the low-frequency strong vibration wave when nonlinear acoustics is used for damage detection. As a result frequency sidebands can be observed around the main acoustic harmonic in the spectrum of the ultrasonic signal.

Sign in / Sign up

Export Citation Format

Share Document