Structural health monitoring for impact damaged composite: a new methodology based on a combination of techniques

Advanced aerospace materials, including fibre-reinforced polymer and ceramic matrix composites, are increasingly being used in critical and demanding applications, challenging not only the current damage prediction, detection and quantification methodologies, but also the residual life of the structure. The main objective of this work consists of developing a new methodology based on different techniques to be applied on structural health monitoring system for impacted composite aeronautic structures. For this, it is necessary to identify, and to localise damage, as well as to calculate the severity of the damage and to predict the residual strength of the composite structure. To achieve these goals, the research methodology should consider three methods: (1) vibration-based method, (2) shearography speckle and (3) flexural after impact. Composite plates, made of epoxy resin reinforced by carbon fibre, are evaluated. First, vibration-based method provides frequency response functions to be analysed by a new metric, which is compared in terms of their capability for damage identification and global location. Afterwards, the extension of impact damage is determined using shearography speckle. This technique has demonstrated great potential for damage detection in composite-laminated structures. A flexure after impact test is used to evaluate its limitations and potentialities as a damage-tolerance technique. The residual flexural strength of damaged specimens is evaluated by quasi-static four-point bending test. A new criterion based on a relationship between damage metric from vibration-based method and flexure after impact analysis is presented and discussed. Finally, it discussed the advantages and limitations of this combination of techniques into the context of structural health monitoring systems.

[1]  Impact and post-impact response of a composite material to multiple non-coincident impacts , 2010 .

[2]  Soonsung. Hong,et al.  NDE of low-velocity impact damages in composite laminates using ESPI, digital shearography and ultrasound C-scan techniques , 2012 .

[3]  J. Santos,et al.  Interferometric techniques in structural damage identification , 2011 .

[4]  Pizhong Qiao,et al.  Vibration-based Damage Identification Methods: A Review and Comparative Study , 2011 .

[5]  David J. Ewins,et al.  Modal Testing: Theory, Practice, And Application , 2000 .

[6]  Charles R. Farrar,et al.  A review of nonlinear dynamics applications to structural health monitoring , 2008 .

[7]  N. Maia,et al.  Localization of damage in beams using interferometric techniques , 2012 .

[8]  Dirk Vandepitte,et al.  A comparative assessment of different frequency based damage detection in unidirectional composite plates using MFC sensors , 2016 .

[9]  J. Leendertz,et al.  An image-shearing speckle-pattern interferometer for measuring bending moments , 1973 .

[10]  Dirk Vandepitte,et al.  Computational model for supporting SHM systems design: Damage identification via numerical analyses , 2017 .

[11]  Marco Giglio,et al.  Feasibility study of a multi-parameter probability of detection formulation for a Lamb waves–based structural health monitoring approach to light alloy aeronautical plates , 2017 .

[12]  Shen Zhen,et al.  A New Method for Compression After Impact Strength Prediction of Composite Laminates , 2002 .

[13]  V. V. Bolotin,et al.  Effect of low-velocity impact on the residual strength of composites , 1994 .

[14]  Uday Sharma,et al.  Modeling and damage repair of woven thermoplastic composites subjected to low velocity impact , 2010 .

[15]  Pramod Rastogi.  Comparative holographic interferometry: A nondestructive inspection system for detection of flaws , 1985 .

[16]  Dirk Vandepitte,et al.  A new methodology for Structural Health Monitoring applications , 2015 .

[17]  C. Santiuste,et al.  Residual flexural strength after low-velocity impact in glass/polyester composite beams , 2010 .

[18]  Subhadarshi Nayak,et al.  Structural Health Monitoring: State of the Art and Perspectives , 2012 .

[19]  Li Ma,et al.  Low-velocity impact and residual tensile strength analysis to carbon fiber composite laminates , 2010 .

[20]  E. Peter Carden,et al.  Vibration Based Condition Monitoring: A Review , 2004 .

[21]  Rune Brincker,et al.  Vibration Based Inspection of Civil Engineering Structures , 1993 .

[22]  S. Sánchez-Sáez,et al.  Compression after impact of thin composite laminates , 2005 .

[23]  Charles R. Farrar,et al.  A summary review of vibration-based damage identification methods , 1998 .

[24]  C. M. Mota Soares,et al.  A numerical-experimental method for damage location based on rotation fields spatial differentiation , 2011 .

[25]  A. Mouritz,et al.  Flexural Strength and Interlaminar Shear Strength of Stitched GRP Laminates Following Repeated Impacts , 1997 .

[26]  A. Rotem.  The strength of laminated composite materials under repeated impact loading , 1988 .

[27]  C. Garnier,et al.  The detection of aeronautical defects in situ on composite structures using Non Destructive Testing , 2011 .

[28]  C. M. Mota Soares,et al.  Damage localization in laminated composite plates using mode shapes measured by pulsed TV holography , 2006 .

[29]  Ricardo de Medeiros.  Development of a criterion for predicting residual strength of composite structures damaged by impact loading , 2016 .

[30]  Christophe Bouvet,et al.  Failure analysis of CFRP laminates subjected to compression after impact: FE simulation using discrete interface elements , 2013 .

[31]  Paulo Sergio Varoto,et al.  Vibration Testing: Theory and Practice , 1995 .

[32]  O. S. Salawu.  Detection of structural damage through changes in frequency: a review , 1997 .

[33]  Francesco Aymerich,et al.  Assessment of NDT interferometric techniques for impact damage detection in composite laminates , 2006 .

[34]  Sudhirkumar V. Barai,et al.  Experimental Investigations and Critical Observations on the Use of Modal Parameters for Structural Damage Detection , 2014 .

[35]  M. D. de Moura,et al.  Residual Strength after Low Velocity Impact in Carbon-Epoxy Laminates , 2006 .

[36]  Ralph P. Tatam,et al.  Shearography technology and applications: a review , 2010 .

[37]  Gilbert-Rainer Gillich,et al.  Natural frequency changes due to damage in composite beams , 2015, Journal of Physics: Conference Series.

[38]  A. M. R. Ribeiro,et al.  A review of vibration-based structural health monitoring with special emphasis on composite materials , 2006 .

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

[40]  Grant P. Steven,et al.  VIBRATION-BASED MODEL-DEPENDENT DAMAGE (DELAMINATION) IDENTIFICATION AND HEALTH MONITORING FOR COMPOSITE STRUCTURES — A REVIEW , 2000 .

[41]  Pierre Jacquot,et al.  Speckle Interferometry: A Review of the Principal Methods in Use for Experimental Mechanics Applications , 2008 .