Nondestructive evaluation of damage in composite structures using modal parameters

Sanders, D. R.; Kim, Y. I.; Stubbs, Norris

doi:10.1007/bf02319362

Cited by 45 publications

(24 citation statements)

References 11 publications

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“…Moreover, this sensitivity method has difficulties when the number of modes is fewer than the number of the damage parameters. Sanders et al (1992*) use the frequency sensitivity method developed by Stubbs and Osegueda (1990a*), combined with an internal-state-variable theory, to detect, locate and quantify damage in CFRP beams. This method includes parameters which indicate two types of damage: matrix micro-cracking by changes in the extensional stiffness, and transverse cracks in the 90-degree plies by changes in the bending stiffness.…”

Section: Natural Frequencies and Frfsmentioning

confidence: 99%

A Review of Vibration-based Structural Health Monitoring with Special Emphasis on Composite Materials

Montalvão¹,

Maia²,

Ribeiro³

2006

The Shock and Vibration Digest

430

243

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Structural health monitoring and damage detection techniques are tools of great importance namely in the offshore, civil, mechanical and aeronautical engineering communities, either due to safety reasons or to the economical benefits it may bring. The need for detecting damage in complex structures has led to the development of a vast amount of techniques, in particular those based upon structural vibration analysis. In the present article, some of the latest advances in Structural Health Monitoring and Damage Detection have been covered, with an emphasis on composite structures, given the fact that this kind of materials have currently a wide range of engineering applications.

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Section: Natural Frequencies and Frfsmentioning

confidence: 99%

A Review of Vibration-based Structural Health Monitoring with Special Emphasis on Composite Materials

Montalvão¹,

Maia²,

Ribeiro³

2006

The Shock and Vibration Digest

430

243

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show abstract

“…changing dynamic moduli in composites [64], changing structural stiffness parameters (typically due to cracks) [27,29,33,[65][66][67][68][69], and microcracking and transverse cracks in composites [70].…”

Section: Frequency Changesmentioning

confidence: 99%

Design and Analysis of Advanced Materials in a Thermal/Acoustic Environment. Delivery Order 0007: Volume 1 - Structural Health Monitoring

Grandhi¹,

Tobe²

2010

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Services, Directorate for Information , 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YY) REPORT TYPE 3. DATES COVERED (From -To)March 2010 0A PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBERWright State University Department of Mechanical and Materials Engineering Dayton, OH 45435 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)Air Force Research Laboratory SPONSORING/MONITORING AGENCY ACRONYM(S)Air ABSTRACTAir vehicles flying at hypersonic speeds encounter extreme thermal, aerodynamic and acoustic loads, utilizing thermal protection systems to shield the main structure from these 1oads.One type of failure in a mechanically attached thermal protection system is fastener failure. Determining structural health monitoring on the fastener health of the thermal protection system is needed and can be completed by analyzing changes in the dynamic characteristics of the system due to fastener failure. The damage detection metrics include the existing modal parameters-modal assurance criterion (MAC), partial (PMAC), and coordinate (CMAC)-as well as two new modal parameters-normalized coordinate MAC and normalized coordinate MAC X summation were investigated. Two new modal parameters were formulated to identify mode shape changes in a structure due to global damage to the structure. Two damage states caused a minimal change to the low-frequency structural dynamics and could not be localized with any of the investigated damage metrics. After the finite element model is validated for the healthy state with free-free boundary conditions, the global boundary conditions and fastener failure damage states are implemented. This damage simulation allows a better understanding of how the damage states cause low-frequency dynamic changes without requiring a experimental data for each of the damage states of interest. SUBJECT TERMSThe damage detection metrics include the existing modal parameters-modal assurance criterion, partial modal assurance criterion, and coordinate modal assurance criterion-as well as two new modal parameters-normalized coordinate modal assurance criterion and normalized coordinate modal assurance criterion summation. The existing modal parameters provide data...

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“…Engblom and Havelka [18] quantified, both numerically and experimentally, the effects of fibre breakage, matrix cracking, local buckling, and delamination based on variations in stiffness and damping characteristics. Sanders, et al [19] bonded near the beam's fixed end and operated as actuator and sensor respectively. Changes of the modal frequencies after delamination initiation, compared to those of a nondelaminated specimen, gave a good indication of the degree of damage, demonstrating the feasibility of using measured changes in the vibration characteristics to detect damage.…”

Section: Introductionmentioning

confidence: 99%

Localization of a delamination and estimation of its length in a composite laminate beam by the VSHM and pattern recognition methods

et al. 2010

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This version is available at https://strathprints.strath.ac.uk/48724/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge. SUMMARY.The focus of this work is to investigate the delamination damage in laminate composite beams, to fix a Vibration-based structural health monitoring ( The study is divided in 3 sections: delamination detection, delamination localization, and delamination estimate. The aim is to determine how the first six harmonics frequencies change due to the delamination, and the results show that they can be successfully used to investigate the presence, the location and the dimensions of the delamination in a composite beam. A Pattern Recognition analysis is used to locate the damage, while the detection and the evaluation are done using the changes in the harmonic frequencies. A finite element analysis is performed, and the variations of the natural frequencies due to delamination are in good agreement with the experimental results.

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Nondestructive evaluation of damage in composite structures using modal parameters

Cited by 45 publications

References 11 publications

A Review of Vibration-based Structural Health Monitoring with Special Emphasis on Composite Materials

A Review of Vibration-based Structural Health Monitoring with Special Emphasis on Composite Materials

Design and Analysis of Advanced Materials in a Thermal/Acoustic Environment. Delivery Order 0007: Volume 1 - Structural Health Monitoring

Localization of a delamination and estimation of its length in a composite laminate beam by the VSHM and pattern recognition methods

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