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| Naji, M. |
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| Petrov, R. H. | Madrid |
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Jalalvand, Meisam
University of Southampton
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (80/80 displayed)
- 2024Numerical modelling of multi-directional thin-ply carbon/glass hybrid composites with open holes under tensioncitations
- 2024High Performance Ductile and Pseudo-ductile Polymer Matrix Compositescitations
- 2023Detection of barely visible impact damage using a smart hybrid composite surface layer
- 2023Smart hybrid composite sensor technology to enhance the detection of low energy impact damage in composite structurescitations
- 2022Manufacturing and mechanical characterisation of unidirectional fique fibre reinforced polypropylene composites
- 2022Free vibration analysis of three-phase CNT/polymer/fiber laminated tow-steered quadrilateral plates considering agglomeration effectscitations
- 2022Investigating the fatigue behaviour of quasi-isotropic pseudo-ductile thin-ply carbon/glass epoxy hybrid compositescitations
- 2022Manufacturing and mechanical characterisation of unidirectional fique fibres reinforced polypropylene composites
- 2022Additive binding layers to suppress free edge delamination in composite laminates under tensioncitations
- 2022A new technique to measure shear fracture toughness of adhesives using tensile loadcitations
- 2022A new technique to measure shear fracture toughness of adhesives using tensile loadcitations
- 2022Evaluation of digital volume correlation (DVC) applicability in silicon dioxide (SiO2) particle-doped carbon fibre reinforced polymers using in situ synchrotron radiation computed tomography (SRCT)
- 2021Gradual failure in high-performance unidirectional thin-ply carbon/glass hybrid composites under bendingcitations
- 2020Self-warning hybrid composite patches for repairing cracked aluminium panels
- 2020A comparative study on glass and carbon fibre reinforced laminated composites in scaled quasi-static indentation testscitations
- 2020High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour loaded off-axiscitations
- 2020Thin ply carbon/glass hybrid laminates to activate new damage mechanisms under indentation
- 2019The high strain rate tension behaviour of pseudo-ductile high performance thin ply compositescitations
- 2019Fatigue behaviour of un-notched and open-hole quasi-isotropic pseudo-ductile thin-ply carbon/glass hybrid laminates
- 2019Experimental and numerical study of hybrid effect in high performance quasi-isotropic thin-ply carbon/glass composites
- 2019Investigation of the hybrid effect in high performance quasi-isotropic thin-ply carbon/glass composites under tension
- 2019Fatigue behavior of un-notched and open-hole quasi-isotropic pseudo-ductile thin-ply carbon/glass hybrid laminates
- 2019A simple and robust approach for visual overload indication - UD thin-ply hybrid composite sensorscitations
- 2018Pseudo-ductility and reduced notch sensitivity in multi-directional all-carbon/epoxy thin-ply hybrid compositescitations
- 2018Self-warning hybrid composite patches for repairing cracked aluminium panels
- 2018Acoustic emission monitoring of thin ply hybrid composites under repeated quasi-static tensile loadingcitations
- 2018Acoustic emission monitoring of thin ply hybrid composites under repeated quasi-static tensile loadingcitations
- 2018Thin ply carbon/ glass hybrid laminates to activate new damage mechanisms under indentation
- 2018Notch insensitive orientation-dispersed pseudo-ductile thin-ply carbon/glass hybrid laminatescitations
- 2018Hierarchical pseudo-ductile hybrid composites combining continuous and highly aligned discontinuous fibrescitations
- 2018Compact tension test behaviour of Pseudo-ductile thin-ply carbon/ glass hybrids
- 2018Bearing and bearing-bypass of pseudo-ductile thin-ply carbon/ glass hybrids
- 2017Pseudo-ductility and reduced notch sensitivity in multi-directional all-carbon/epoxy thin-ply hybrid compositescitations
- 2017Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites
- 2017Design and characterisation of high performance, pseudo-ductile all-carbon/epoxy unidirectional hybrid compositescitations
- 2017High performance piezo electric nanocomposite sensor nodes for structural health monitoring: 21st International Conference on Composite Materials, ICCM 2017
- 2017UD hybrid composite overload sensors: 21st International Conference on Composite Materials, ICCM 2017
- 2017Unidirectional hybrid composite overload sensors
- 2017High performance piezo electric nanocomposite sensor nodes for structural health monitoring
- 2017UD hybrid composite overload sensors
- 2017A novel technique to accurately measure the fibre failure strain in composite laminates under a combined in-plane tension and shear stress state
- 2017High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour in all fibre orientationscitations
- 2017Aligned discontinuous intermingled reclaimed/virgin carbon fibre composites for high performance and pseudo-ductile behaviour in interlaminated carbon-glass hybridscitations
- 2017Demonstration of pseudo-ductility in all fibre directions of high performance quasi-isotropic thin ply carbon/glass hybrid composites
- 2017Demonstration of pseudo-ductility in all fibre directions of high performance quasi-isotropic thin ply carbon/glass hybrid composites: 21st International Conference on Composite Materials, ICCM 2017
- 2017Analysis of the damage mechanisms in mixed-mode delamination of laminated composites using acoustic emission data clusteringcitations
- 2017Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delaminationcitations
- 2017Design and characterisation of high performance pseudo ductile all carbon/epoxy unidirectional hybrid compositescitations
- 2016Hybrid effects in thin ply carbon/glass unidirectional laminatescitations
- 2016Micro/macro approach for prediction of matrix cracking evolution in laminated compositescitations
- 2016Avoiding free edge delamination in quasi-isotropic pseudo-ductile hybrid laminates - by material dispersion or layer angle dispersion?: 17th European Conference on Composite Materials, ECCM 2016
- 2016Hybrid effects in thin ply carbon/glass unidirectional laminates:accurate experimental determination and predictioncitations
- 2016Acoustic emission monitoring of thin ply hybrid composites under repeated quasi-static tensile loading
- 2016Avoiding free edge delamination in quasi-isotropic pseudo-ductile hybrid laminates - by material dispersion or layer angle dispersion?
- 2016Hybrid specimens eliminating stress concentrations in tensile and compressive testing of unidirectional compositescitations
- 2016Design and characterisation of advanced pseudo-ductile unidirectional thin-ply carbon/epoxy-glass/epoxy hybrid compositescitations
- 2016Combining fibre rotation and fragmentation to achieve pseudo-ductile CFRP laminatescitations
- 2016Taking advantage of the hybrid effect in thin-ply pseudo-ductile laminates
- 2015Novel experimental procedure and determination of full displacement fields of delaminating composite layer interfaces for evaluation of the mode II cohesive lawcitations
- 2015Multi-directional hybrid laminates-studying the effect of fragmentation and dispersed delamination on stress-strain curves of unnotched laminates using analytical modelling.
- 2015Demonstration of pseudo-ductility in unidirectional hybrid composites made of discontinuous carbon/epoxy and continuous glass/epoxy pliescitations
- 2015Multi-directional hybrid laminates - studying the effect of fragmentation and dispersed delamination on stress-strain curves of unnotched laminates using analytical modelling
- 2015Reducing the notch sensitivity of quasi-isotropic layups using thin-ply hybrid laminates
- 2015Advanced experimental techniques for determination of the tensile and compressive failure strain of carbon/epoxy composites
- 2015Analysis of the damage mechanisms in mixed-mode delamination of laminated composites using acoustic emission data clusteringcitations
- 2015Damage analysis of pseudo-ductile thin-ply UD hybrid composites – a new analytical methodcitations
- 2015Model validation of the hybrid effect in carbon/glass hybrid composites
- 2015Parametric study of failure mechanisms and optimal configurations of pseudo-ductile thin-ply UD hybrid compositescitations
- 2015Pseudo-ductility in intermingled carbon/glass hybrid composites with highly aligned discontinuous fibrescitations
- 2014Hybrid composites with aligned discontinuous fibres
- 2014Damage mode maps and parametric study of thin UD hybrid composites
- 2014Development of pseudo-ductile hybrid composites with discontinuous carbon- and continuous glass prepregs
- 2014Pseudo-ductility by fragmentation of central unidirectional plies in thin CFRP angle-ply laminates
- 2014Initial steps towards the determination of the actual mode II traction-separation law of composite interfaces: Experimental procedure to obtain the full displacement and strain fields
- 2013Numerical modelling of the damage modes in UD thin carbon/glass hybrid laminates - Sensitivity analysis
- 2013Homogenization of diffuse delamination in composite laminatescitations
- 2013Numerical modeling of diffuse transverse cracks and induced delamination using cohesive elementscitations
- 2011Numerical aspects of delamination modeling using interface elements: 8th International Conference on Composite Science and Technology, ICCST8citations
- 2011Numerical aspects of delamination modeling using interface elementscitations
- 2009Delamination analysis of holed composite laminates using interface elementscitations
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article
Analysis of the damage mechanisms in mixed-mode delamination of laminated composites using acoustic emission data clustering
Abstract
In this study, acoustic emission (AE) technique is used to investigate different time-to-failure mechanisms of delamination in glass/epoxy composite laminates. Woven and unidirectional layups were subjected to the double cantilever beam, end notch flexure, and mixed-mode bending tests and the generated AE signals were captured. Discrimination of the AE events, caused by different types of the damage mechanisms, was performed using wavelet packet transform (WPT) and fuzzy clustering method (FCM) associated with a principal component analysis (PCA). The FCM and WPT analyses identified three dominant damage mechanisms. Furthermore, different interface layups and different GII/GT modal ratio values (ratio of mode II strain energy release rate per total strain energy release rate) indicated different time-to-failure mechanisms incidence. Additionally, the damaged mechanisms were observed using scanning electron microscopic (SEM) analysis. The results showed that the dominant damage mechanisms in all the specimens are matrix cracking and fiber-matrix debonding. Besides, some fiber breakage appeared during the tests, and the percentage of this damage mechanism in the unidirectional specimens and mode I condition was higher than those in the woven specimens and mode II. SEM observations were also in good agreement with the obtained results. It was found that the presented methods can be utilized to improve the characterization and discrimination of damage mechanisms in the actual occurring modes of delamination in composite structures.