Characterization of composite materials damage under quasi-static three-point bending test using wavelet and fuzzy C-means clustering

Fotouhi, Mohamad; Heidary, Hossein; Ahmadi, Mehdi; Pashmforoush, Farzad

doi:10.1177/0021998311425968

Cited by 57 publications

(44 citation statements)

References 33 publications

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“…These damage mechanisms, i.e. matrix cracking, fiber failure, etc., are the origins of the AE signals that are recorded by piezoelectric transducer [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Prediction of delamination growth in carbon/epoxy composites using a novel acoustic emission-based approach

Mohammadi

Saeedifar

Hosseini‐Toudeshky

et al. 2015

Journal of Reinforced Plastics and Composites

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Mohammadi, R., Saeedifar, M., Toudeshky, H. H., Najafabadi, M. A. and Fotouhi, M. (2015) Prediction of delamination growth in carbon/epoxy composites using a novel acoustic emission-based approach. Journal of Reinforced Plastics and Composites, 34 (11). pp. 868-878. ISSN 0731-6844 Available from: http://eprints.uwe.ac.uk/33481We recommend you cite the published version. The publisher's URL is: http://dx.doi.org/10.1177/0731684415583166Refereed: Yes (no note) Disclaimer UWE has obtained warranties from all depositors as to their title in the material deposited and as to their right to deposit such material. UWE makes no representation or warranties of commercial utility, title, or fitness for a particular purpose or any other warranty, express or implied in respect of any material deposited. UWE makes no representation that the use of the materials will not infringe any patent, copyright, trademark or other property or proprietary rights.UWE accepts no liability for any infringement of intellectual property rights in any material deposited but will remove such material from public view pending investigation in the event of an allegation of any such infringement. PLEASE SCROLL DOWN FOR TEXT. Acoustic Emission based interlaminar crack growth monitoring in Carbon/Epoxy Composites AbstractContinuous fiber-reinforced composites, such as those consisting of carbon fibers in an epoxy resin, offer an attractive potential for reducing the weight of high-performance structures. Delamination is the most common mode of failure in these laminated composites and it leads to loss of structural strength and stiffness. In this paper, in-situ Acoustic Emission (AE) monitoring are done on the carbon/epoxy laminated composites when subjected to mode I, mode II and mixed-mode I & II loading conditions. The main objective is to investigate delamination behavior and to predict propagation curve of the delamination in different G II /G T modal ratio values by AE.First, combination of AE and mechanical data (sentry function) is used to characterize propagation stage of the delamination. Next, crack tip location during propagation of the delamination is identified using two methods. In the first method, by determining velocity of the AE waves in the specimens and some filtration methods which are applied on the AE signals, position of the crack tip is determined at any time of the tests. In the second method, cumulative energy of the AE signals is utilized for localization of the crack tip. The relationship between the cumulative AE energy and crack growth is developed and presented based on the experimental data. Agreement between the predicted crack length and actual crack length verifies the presented procedures. It can be concluded from the results that AE method is a powerful approach

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“…These damage mechanisms, i.e. matrix cracking, fiber failure, etc., are the origins of the AE signals that are recorded by piezoelectric transducer [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Prediction of delamination growth in carbon/epoxy composites using a novel acoustic emission-based approach

Mohammadi

Saeedifar

Hosseini‐Toudeshky

et al. 2015

Journal of Reinforced Plastics and Composites

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“…[21][22][23]. Recently, AE has been utilized as an applicable technique to detect in-situ information from the damages that occur in laminated composites [5,[24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission-Based Methodology to Evaluate Delamination Crack Growth Under Quasi-static and Fatigue Loading Conditions

et al. 2017

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The aim of this study was to investigate the applicability of acoustic emission (AE) technique to evaluate delamination crack in glass/epoxy composite laminates under quasi-static and fatigue loading. To this aim, double cantilever beam specimens were subjected to mode I quasistatic and fatigue loading conditions and the generated AE signals were recorded during the tests. By analyzing the mechanical and AE results, an analytical correlation between the AE energy with the released strain energy and the crack growth was established. It was found that there is a 3rd degree polynomial correlation between the crack growth and the cumulative AE energy. Using this correlation the delamination crack growth was predicted under both the static and fatigue loading conditions. The predicted crack growth values was were in a good agreement with the visually recorded data during the tests. The results indicated that the proposed AE-based method has good applicability to evaluate the delamination crack growth under quasi-static and fatigue loading conditions, especially when the crack is embedded within the structure and could not be seen visually. B Milad Saeedifar

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“…Some researchers analysed different types of failure modes using Acoustic Emission in composites by supervised and non-supervised methods [16][17][18][19][20][21][22][23][24][25][26][27]. In supervised learning the categories, data is assigned to be known before computation.…”

Section: Introductionmentioning

confidence: 99%

Supervised and non-supervised AE data classification of nanomodified CFRP during DCB tests

Fallahi¹,

Nardoni²,

Heidary³

et al. 2016

FME Transaction

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Characterization of composite materials damage under quasi-static three-point bending test using wavelet and fuzzy C-means clustering

Cited by 57 publications

References 33 publications

Prediction of delamination growth in carbon/epoxy composites using a novel acoustic emission-based approach

Prediction of delamination growth in carbon/epoxy composites using a novel acoustic emission-based approach

Acoustic Emission-Based Methodology to Evaluate Delamination Crack Growth Under Quasi-static and Fatigue Loading Conditions

Supervised and non-supervised AE data classification of nanomodified CFRP during DCB tests

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