Assessing the damage evolution of composites containing embedded fibre optics / Gabriele Chiesura in JEC COMPOSITES MAGAZINE, N° 97 (05-06/2015)  

[article]  inJEC COMPOSITES MAGAZINE > N° 97 (05-06/2015) . - p. 60-63 Titre : Assessing the damage evolution of composites containing embedded fibre optics Type de document : texte imprimé Auteurs : Gabriele Chiesura, Auteur ; Geert Luyckx, Auteur ; Manuel Dierick, Auteur ; Wim Van Paepegem, Auteur ; Joris Degrieck, Auteur Année de publication : 2015 Article en page(s) : p. 60-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres Contrôle non destructif Endommagement (mécanique) Evaluation Fibres optiques Stratifiés Tomographie Index. décimale : 668.4 Plastiques, vinyles Résumé : In the work presented in this article, the non-destructive technique known as micro-computed tomography (micro-CT) was used to investigate the internal state of composite laminates containing embedded fibre optics. The laminates were subjected to cyclic loading and the damage was followed up in order to determine if the sensors affected composite lifetime. The experiments showed no significant evidence of damage related to the sensor's presence. Note de contenu : - MATERIALS AND METHOD : Micro-CT setup - EXPERIMENTAL RESULS : Initial state after curing - Damage evolution - FIGURES : 1. Fatigue testing set-up with detail of the sample geometry and lay-up ; the scanned region is highlighted in red on the sample - 2. Micro-computed tomography (micro-CT) scanner used for the nondestructive inspections - 3. Transverse cracks (confined in white boxes) evolving in the 90° plies due to fatigue cycling ; the optical fibre highlighted in red in the centre of the laminate TABLE : Number of cracks counted on a section passing along the axis of the QFS for a growing number of cycles En ligne : https://drive.google.com/file/d/1HcKilRhryNCWD0HSCG9XIM5_bTP4PjVV/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24319 [article]

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Elastic properties of orthotropic composites using the US polar scan method / Mathias Kersemans in JEC COMPOSITES MAGAZINE, N° 75 (08-09/2012)

[article]  inJEC COMPOSITES MAGAZINE > N° 75 (08-09/2012) . - p. 48-52 Titre : Elastic properties of orthotropic composites using the US polar scan method Type de document : texte imprimé Auteurs : Mathias Kersemans, Auteur ; Nicolas Lammens, Auteur ; Geert Luyckx, Auteur ; Joris Degrieck, Auteur ; Wim Van Paepegem, Auteur Année de publication : 2012 Article en page(s) : p. 48-52 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites Contrôle non destructif Imagerie ultrasonore Matériaux -- Fatigue Mesure Index. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : Due to the increasing use of composite materials in critical structural applications demanding a high strength-to-weight ratio, reliable evaluation tools are now more than ever necessary. Ultrasound is well known in the field of non-destructive testing and evaluation (NDTetE) and classical ultrasonic C-scan techniques have already proved their usefulness in visualizing defects, delaminations, etc. However, due to their inherent limitations in quantitative characterization, the quest for more sophisticated NDTetE methods to monitor complex damage mechanisms is a significant challenge in current research since one of the most critical degradation mechanisms of composite materials involves fatigue, which is associate with a localized reduction of the material stiffness. The very promising ultrasonic polar scan technique is investigated and discussed in this study. Note de contenu : RESULTS AND DISCUSSION : Polar scan and forward modelling - Polar scan and inverse modelling - EXTENSIONS OF THE POLAR SCAN PRINCIPLE : Backscatter polar scan - Gradient polar scan Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16277 [article]

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