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Failure investigation of polymeric composite components / Spyros Tsampas in JEC COMPOSITES MAGAZINE, N° 98 (07-08/2015)
[article]
Titre : Failure investigation of polymeric composite components Type de document : texte imprimé Auteurs : Spyros Tsampas, Auteur ; Emile S. Greenhalgh, Auteur Année de publication : 2015 Article en page(s) : p. 46-49 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse des défaillances (fiabilité)
Avions -- Matériaux
Composites -- Rupture
Fractographie
Rupture (mécanique)
Stratifiés -- RuptureIndex. décimale : 668.4 Plastiques, vinyles Résumé :
Fractographic analysis, i.e. the examination and interpretation of fracture surfaces, provides an insight into the causes and location of failure. Previously considered as a "black art", specialists now relate fracture morphologies to failure mechanisms with confidence and provide information about the failure sequence and source of failure initiation. This technique gives great feedback and can allow better design for next-generation parts.Note de contenu : - Fig. 1. Composite failure in the longitudinal lug of a vertical stabiliser on an Airbus 1300 AA587
- Fig. 2. Failure modes in a composite laminate
- Fig. 3. Assembly diagram of a failed component
- Fig. 4. X-ray radiography of a quasi-isotropic composite specimen failed in compression ; ultrasonic scan of an impacted plain composite panel
- Fig. 5. Mode II fracture morphology illustrating the formation and inclination of cusps
- Fig. 6. Mixed mode I/II fracture morphology illustrating riverlines and textured microflow and cusps features
- Fig. 7. Vertical stabilizer after recovery from Jamaica Bay
- Fig. 8. Failed composite components from the vertical tail of the A300-605RPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25531
in JEC COMPOSITES MAGAZINE > N° 98 (07-08/2015) . - p. 46-49[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17330 - Périodique Bibliothèque principale Documentaires Disponible 17329 - Périodique Bibliothèque principale Documentaires Disponible Failure of coatings over joints and gaps: finite-element models / Aaron J. Feickert in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)
[article]
Titre : Failure of coatings over joints and gaps: finite-element models Type de document : texte imprimé Auteurs : Aaron J. Feickert, Auteur ; S. G. Croll, Auteur Année de publication : 2018 Article en page(s) : p. 281-291 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
Eléments finis, Méthode des
Flexion (mécanique)
Joints d'étanchéité
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Traction (mécanique)Index. décimale : 667.9 Revêtements et enduits Résumé : Painting over joints and the narrow gaps around fasteners is extremely common. When the joint or gap is stressed, the gap opens and the coating over it is subject to very large strains that may immediately or eventually cause it to fail and thus permit corrosion, etc. Improving the design or selection of coatings to overcome this problem requires quantification of the imposed elongation of the coating. A simple coated butt joint geometry, in tension and in bending, is modeled by finite-element analysis to examine how coatings of different modulus respond to the opening of a joint, particularly showing regions where strain distributions may provoke failure. More loci of possible initial failure occur when the gap is filled by a material that is different from the coating over the gap because there is an added interface. Note de contenu : - MODELS : Joint models
- RESULTS : Tensile butt joint - Effect of coating thickness - Flexed butt jointDOI : 10.1007/s11998-017-9986-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9986-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30282
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 281-291[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19742 - Périodique Bibliothèque principale Documentaires Disponible Failure prediction of GFRP pultruded single-lap adhesive joints / Francesco Marchione in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 3 (06/2021)
[article]
Titre : Failure prediction of GFRP pultruded single-lap adhesive joints Type de document : texte imprimé Auteurs : Francesco Marchione, Auteur Année de publication : 2021 Article en page(s) : p. 117-123 Note générale : Bibliogr. Langues : Français (fre) Catégories : Analyse des défaillances (fiabilité)
Assemblages collés
Cisaillement (mécanique)
Composites -- Collage
Composites à fibres de verre
Epoxydes
Essais dynamiques
Polyacryliques
Polyméthacrylates
Polyuréthanes
Prévision, Théorie de la
Stratifiés -- Propriétés mécaniques
Traction (mécanique)Index. décimale : 668.4 Plastiques, vinyles Résumé : Adhesive bonding is experiencing a significant increase in its use in various industrial fields, thanks to the numerous advantages it offers, such as a better distribution of stresses in the resulting structure. This aspect is of importance for joints between composite substrates, which are not very resistant to concentrated stresses. The aim of this work is to present a simplified method for predicting the failure load of a single-lap adhesive joint. This theoretical model is applied to the results of an experimental study to verify the effectiveness of the adhesive bond between pultruded GFRP adherends. The results of shear tests on specimens assembled with different adhesives and subjected to different artificial ageing conditions are reported. The experimental results recorded by shear tests were processed by the simplified shear-slip model based on fracture energy. The obtained experimental results are compared with the theoretical values obtained using the analysis of the cohesive zone model theory. Then, a simple computational model is proposed for the evaluation and design of the ultimate load in single-lap adhesive joints. Note de contenu : - Joint failure mechanism : Theoretical analysis of a single-lap joint
- Experiments : Material properties - Specimens geometry - Artificial ageing
- Results and discussion : Shear tests on single-lap adhesive joints
- Interfacial shear stress-slip law
- Joint failure mechanism : Theoretical analysis of a single-lap joint
- Experiments : Material properties - Specimens geometry - Artificial ageing
- Results and discussion : Shear tests on single-lap adhesive joints
- Interfacial shear stress-slip law
- Table 1 : GFRP mechanical properties
- Table 2 : Technical and mechanical characteristics of the adhesives reported by manufacturers
- Table 3 : Mechanical properties of adhesives dogbones
- Table 4 : Mechanical properties of GFRP-GFRP single-lap joints under different environmental aging conditions
- Table 5 : Comparison of experimental results with theoretical dataDOI : https://doi.org/10.18280/rcma.310301 En ligne : https://www.iieta.org/download/file/fid/56437 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37663
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 3 (06/2021) . - p. 117-123[article]Failure prediction of waterborne barrier coatings during folding / Yaping Zhu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
[article]
Titre : Failure prediction of waterborne barrier coatings during folding Type de document : texte imprimé Auteurs : Yaping Zhu, Auteur ; Douglas W. Bousfield, Auteur ; William Gramlich, Auteur Année de publication : 2021 Article en page(s) : p. pages 1117-1129 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
Matériaux -- Propriétés barrières
Modèles techniques
Pliage (mécanique)
Revêtements -- Fissuration
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Adding pigments into waterborne barrier coatings improves barrier properties and cost-effectiveness but increases the risk of crack formation during folding. Crack formation is affected by pigment shape, aspect ratio, and concentration; however, the exact mechanism for these effects is still not well understood. In this work, a systematic model was used to understand the influence of the paper and coating thickness, the latex and pigment modulus, the pigment shape and aspect ratio, and pigment concentration on the failure of waterborne barrier coatings during folding. A finite element method-based model was solved with a commercial package to simulate the folding process. These simulations were compared to experimental results to verify the key parameters that affect coating failure. High paper and coating thickness, pigment loadings, pigment aspect ratios, and modulus differences between latex and pigment increased the likelihood of failure. Experiments and models using lower modulus spherical plastic pigments were more difficult to fail than coatings made with higher modulus kaolin. The maximum strain for coatings bent to a set curvature was the smallest when the modulus of latex and pigment were similar. The model agreed closely with experimental results for two pigment types at various pigment loadings. Note de contenu : - METHODS : Model setup - Modeling general coating systems - Modeling experimental systems - Bending experiments - Comparing model and experimental results
- RESULTS AND DISCUSSION : Shape and aspect ratio effects - Modulus effects - Paper and coating thickness effects - Comparison of simulation and experiment
- Table 1 : Material properties in model
- Table 2 : Model parameters to compare to experimentsDOI : https://doi.org/10.1007/s11998-021-00465-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00465-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36218
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 4 (07/2021) . - p. pages 1117-1129[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22969 - Périodique Bibliothèque principale Documentaires Disponible Gap-filling efficiency of elastic bondings / Martin Brandtner-Hafner in ADHESION - ADHESIVES + SEALANTS, Vol. 20, N° 3/2023 (2023)
[article]
Titre : Gap-filling efficiency of elastic bondings Type de document : texte imprimé Auteurs : Martin Brandtner-Hafner, Auteur Année de publication : 2023 Article en page(s) : p. 26-30 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésion -- Défauts
Analyse des défaillances (fiabilité)
Assemblages collés
Colles:Adhésifs
Liaison structurale
PorositéIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : The performance of adhesives depends on a variety of influencing factors. In addition to technical parameters, economic aspects also play a major role. The influencing parameter "gap-filling efficiency" is considered in this paper from a technical-economic point of view by means of a comprehensive fracture analysis. This enables users to optimize their adhesive joint in terms of cost minimization and performance maximization. Note de contenu : - Gap bridging as a performance criterion
- Evaluation of gap-filling efficiency
- Categorization of failure modes as a function of gap
- Definition of empirical gap-filling efficiency
- Adhesive waste as a function of gap width
- Case study
- Results and discussion
- Table 1 : Test adhesives for evaluating the gap-filling efficiencyEn ligne : https://drive.google.com/file/d/1MIo9VuTY6rrmqfBroDrR3P8jZiTxi5VY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39736
in ADHESION - ADHESIVES + SEALANTS > Vol. 20, N° 3/2023 (2023) . - p. 26-30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24158 - Périodique Bibliothèque principale Documentaires Disponible Handbook of plastics failure analysis / Friedrich Kurr / München [Germany] : Carl Hanser Verlag (2015)
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