Methodology for optimal configuration in structural health monitoring of composite bonded joints

In this study, a structural health monitoring (SHM) strategy is proposed in order to detect disbonds in a composite lap-joint. The structure under study is composed of a carbon fiber reinforced polymer (CFRP) bonded to a titanium plate and artificial disbonds are simulated by inserting Teflon tapes of various dimensions within the joint. In situ inspection is ensured by piezoceramics bonded to the structure to generate and measure guided waves. Theoretical propagation and through-thickness stress distribution are first studied in order to determine damage sensitivity with respect to the mode and frequency of the generated guided wave. The optimal configuration of the system in terms of piezoceramic size, shape and inter-unit spacing is then validated using finite element modeling (FEM) in 3D. Experimental assessment of propagation characteristics is conducted using laser Doppler vibrometer (LDV) in order to justify theoretical and numerical assumptions and pitch–catch measurements are then performed to validate the efficient detection of the damage and accurate estimation of its size.

[1]  Philippe Micheau,et al.  Structural health monitoring strategy for detection of interlaminar delamination in composite plates , 2010, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[2]  Peter Cawley,et al.  A 2-dimensional Fourier transform method for the quantitative measurement of Lamb modes , 1990, IEEE Symposium on Ultrasonics.

[3]  Jeong-Beom Ihn,et al.  Pitch-catch Active Sensing Methods in Structural Health Monitoring for Aircraft Structures , 2008 .

[4]  Ivan Bartoli,et al.  The response of rectangular piezoelectric sensors to Rayleigh and Lamb ultrasonic waves , 2007 .

[5]  Michel Castaings,et al.  Finite elements methods for modeling the guided waves propagation in structures with weak interfaces , 2005 .

[6]  Lowe,et al.  The transmission of Lamb waves across adhesively bonded lap joints , 2000, The Journal of the Acoustical Society of America.

[7]  M. Castaings,et al.  Guided waves propagating in sandwich structures made of anisotropic, viscoelastic, composite materials. , 2003, The Journal of the Acoustical Society of America.

[8]  Takahiro Hayashi,et al.  Multiple reflections of Lamb waves at a delamination. , 2002, Ultrasonics.

[9]  Ivan Bartoli,et al.  Ultrasonic guided wave monitoring of composite wing skin-to-spar bonded joints in aerospace structures , 2005 .

[10]  Hoon Sohn,et al.  Lamb wave tuning curve calibration for surface-bonded piezoelectric transducers , 2009 .

[11]  Philippe Micheau,et al.  Dispersion-based imaging for structural health monitoring using sparse and compact arrays , 2011 .

[12]  Carlos E. S. Cesnik,et al.  Finite-dimensional piezoelectric transducer modeling for guided wave based structural health monitoring , 2005 .

[13]  Francesco Lanza di Scalea,et al.  Propagation of ultrasonic guided waves in lap-shear adhesive joints: case of incident a0 Lamb wave. , 2004 .

[14]  A. Higgins.  Adhesive bonding of aircraft structures , 2000 .

[15]  Tribikram Kundu,et al.  Detection of kissing bonds by Lamb waves , 1998 .

[16]  Keith Worden,et al.  An introduction to structural health monitoring , 2007, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[17]  L. Jacobs,et al.  Characterization of adhesive bond properties using Lamb waves , 2000 .

[18]  Patrice Masson,et al.  Assessment of PZT transducer bonding techniques under drop-weight impact loading in composites , 2011, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[19]  M.J.S. Lowe,et al.  Matrix techniques for modeling ultrasonic waves in multilayered media , 1995, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[20]  Constantinos Soutis,et al.  Damage detection in composite materials using lamb wave methods , 2002 .

[21]  Peter B. Nagy,et al.  Nondestructive evaluation of adhesive joints by guided waves , 1989 .

[22]  Kevin A. Snook,et al.  縦方向電界場中で曲げたPIN-PMN-PT単結晶の強度 , 2011 .

[23]  Laurence J. Jacobs,et al.  Propagation of guided waves in adhesive bonded components , 2002 .

[24]  Nezih Mrad,et al.  Broadband generation of ultrasonic guided waves using piezoceramics and sub-band decomposition , 2012, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[25]  Robert D. Adams,et al.  Nondestructive testing of adhesively-bonded joints , 1997 .

[26]  Patrice Masson,et al.  ArF excimer laser micromachining of Pyrex, SiC and PZT for rapid prototyping of MEMS components , 2007 .