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Mechanical behaviour of multifunctional composites / Patricia Krawczak in JEC COMPOSITES MAGAZINE, N° 150 (04-05/2023)
[article]
Titre : Mechanical behaviour of multifunctional composites Type de document : texte imprimé Auteurs : Patricia Krawczak, Auteur ; Christian Weisse, Auteur Année de publication : 2023 Article en page(s) : p. 84-87 Langues : Anglais (eng) Catégories : Caractérisation
Composites à fibres de verre
Cuivre
Elasticité
Equipements électroniques ou électriques (EEE)
Essais dynamiques
Flexion (mécanique)
Flexion trois points
Structures multicouches
Textiles et tissus à usages techniques -- Propriétés mécaniques
TissésIndex. décimale : 668.4 Plastiques, vinyles Résumé : MCVE Technologie, in collaboration with the Centre for Materials and Process of IMT Nord Europe, has recently validated and qualified the use of its solution for functionalising glass fibre fabrics. This article explains how composite materials can be endowed with electronic functions without compromising the mechanical behavious for their intended end use. Note de contenu : - Fig. 1 : Nine test specimen designs
- Fig. 2 : Diagram showing layer stacking
- Fig. 3 : Longitudinal modulus of elasticity versus to copper surface area
- Fig. 4 : Ranges of values for a plane shearing strength
- Fig. 5 : Range of values for the flexural modulus (Functional layer placed at theneutral axis or near t the side in tension state of the tesst sample
- Fig. 6 : Range of values for the interlaminar shear strength (functional layer placed at the neutral axis or near the side in tension state of the test sample
- Fig. 7 : Linen fabric functionalized with EOPROM. Tin solder on copperEn ligne : https://drive.google.com/file/d/1mfbL9PpzWEecXpoi1fxKziWoS68TZd2C/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40202
in JEC COMPOSITES MAGAZINE > N° 150 (04-05/2023) . - p. 84-87[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23948 - Périodique Bibliothèque principale Documentaires Disponible Microchannel deformation of polymer chip in in-mold bonding / C.-P. Chu in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 2 (05/2014)
[article]
Titre : Microchannel deformation of polymer chip in in-mold bonding Type de document : texte imprimé Auteurs : C.-P. Chu, Auteur ; B.-Y. Jiang, Auteur ; F.-Z. Jiang, Auteur Année de publication : 2014 Article en page(s) : p. 245-251 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse numérique
Cisaillement (mécanique)
Elasticité
Eléments finis, Méthode des
Essais dynamiques
Fluage
Matières plastiques -- Moulage par injection
Microcanaux (matériaux)
Phénomènes de relaxation (matériaux)
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
Simulation par ordinateurIndex. décimale : 668.9 Polymères Résumé : Microchannel deformation is a problem which often occurs in the thermal bonding of polymer microfluidic chip, and which is significantly determined by bonding parameters. In this paper, numerical analysis of the microchannel deformation in the process of in-mold bonding polymer chip was conducted, using Young's modulus and shear relaxation modulus of polymethylmethacrylate (PMMA) obtained in creep tests. Adhesion between the top and two lateral walls of microchannel was observed in the results, which can be attributed mainly to the viscoelastic deformation of PMMA. It was also revealed that the maximum percent deformation of microchannel is in height, and that bonding temperature had greater effect on the deformation of microchannel than bonding pressure and bonding time. The deformation of microchannel in simulation were consistent with those of experiment under the optimized parameters of 105 °C, 2 MPa and 240 s. Note de contenu : - IN-MOLD BONDING PROCESS OF MICROFLUIDIC CHIP
- SIMULATION OF IN-MOLD BONDING : Material testing - Finite-element simulation
- EXPERIMENTAL VERIFICATION
- RESULTS AND DISCUSSION : Material testing - Analysis of the microchannel deformation in the in-mold bonding - The impact of bonding temperature - The impact of bonding pressure - The impact of bonding time - Experimental verificationDOI : 10.3139/217.2845 En ligne : https://drive.google.com/file/d/14ez5Ii2B9LECP0YM1Q_6-80IopfPRvHd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21319
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 2 (05/2014) . - p. 245-251[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16222 - Périodique Bibliothèque principale Documentaires Disponible Microscopic analysis of the tensile properties of cattle collagen / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 6 (11-12/2022)
[article]
Titre : Microscopic analysis of the tensile properties of cattle collagen Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Huang Zhuo, Auteur ; Fang Songchun, Auteur ; Jinlong Zhao, Auteur Année de publication : 2022 Article en page(s) : p. 252-254 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
Elasticité
Essais dynamiques
Microscopie
Traction (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The tensile property of cattle leather is an important mechanical property. To study the mechanical properties of cattle leather for clothing, the stretching process of 1CGD was simulated by steered molecular dynamics (SMD). The experiment was set up with 5 temperatures and 5 stretching rates. The stress-strain curves of collagen and Young's modulus of the collagen were obtained during the whole process. The results revealed a significant effect of temperature and stretching rate on the stress-strain curve of collagen. When the temperature is constant, the stress-strain curve decreases with the increase of tensile rate, and the stress-strain curve has three forms: viscoelasticity, upward extension and linear change. The higher temperature, the lower Young's modulus. The higher stretching rate, the lower Young's modulus. Note de contenu : - Research theory
- Experimental procedures
- Results and discussion : Conformation change - Analysis of stress-strain - Analysis of Young's modulusEn ligne : https://drive.google.com/file/d/1g91amVFE_mgAfr6EE8QU1WbfIJNc3HGw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38517
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 106, N° 6 (11-12/2022) . - p. 252-254[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23756 - Périodique Bibliothèque principale Documentaires Disponible Microstructure design of CTAC:FA and BTAC:FA lamellar gels for optimized rheological performance utilizing automated formulation platform / A. R. Davies in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 3 (06/2020)
[article]
Titre : Microstructure design of CTAC:FA and BTAC:FA lamellar gels for optimized rheological performance utilizing automated formulation platform Type de document : document électronique Auteurs : A. R. Davies, Auteur ; S. Amin, Auteur Année de publication : 2020 Article en page(s) : p. 259-269 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcools gras
Automatisation
Cheveux -- Soins et hygiène
Chlorure de behentrimonium
Chlorure de cétrimonium
Composés lamellaires
Dilution
Elasticité
Formulation (Génie chimique)
Gels -- Emploi en cosmétologie
Micelles
Produits après-shampooings
Rhéologie
Surfactants
Systèmes auto-assemblésIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objectives : The main objective of this paper was to optimize hair conditioner performance through variation of composition utilizing automated cosmetic formulation platform and advanced characterization techniques as well as develop understanding of how performance (wet combing and wet lubrication) of hair conditioner is affected by its rheology (i.e. yield stress) and controlled breakdown of the formulations (dilution). The experimental results show that yield stress greatly impacts rheology, stability and performance of the lamellar gels for hair conditioning.
- Methods : All samples were prepared on the Chemspeed Flex Formax. A mechanical rheometer was used to measure bulk viscosity and yield stress in each sample. Dia-stron tensile tester was used to measure the lamellar gels ability to reduce combing force. Potential stronger lamellar gel network formation in the formed lamellar gels potentially leads to higher yield stress exhibited. Viscosity values were also measured after a controlled breakdown (i.e. dilution) of each sample. This was also carried out using a mechanical rheometer.
- Results : Yield stress of the formulations was engineered through composition variation and was recorded in each system. The highest yield stress value is 251.179 Pa at a BTAC/CA ratio of 6:10, and the lowest yield stress is 50.14 Pa at a BTAC/CA ratio of 6:5. The highest yield stress value is 50.14 Pa at a CTAC/CA ratio of 6:10, and the lowest yield stress is 19.98 Pa at a CTAC/CA ratio of 2:10. The highest overall yield stress values can also be observed in the BTAC/CA system, whereas the CTAC/CA system has relatively lower yield stress values. Dilution of each formulation caused a breakdown in viscosity of each formulation with the formulations with highest yield stress maintaining higher viscosity than the other formulations. The formulations with highest yield stress in each system which also maintains the highest dilution viscosity (6% BTAC/10% CA and 6% CTAC/10% CA) have the best effect on reducing overall combing force, that is from dry hair tress to wet hair tress and after product is rinsed off. At a BTAC/CA system of ratio 6:5, there is an 89% reduction in combing force and a 95% reduction in combing force in the BTAC/CA system of ratio 6:10. At a CTAC/CA system of ratio 2:10, there is a 65% reduction in combing force and a 88% reduction in combing force in the CTAC/CA system of ratio 6:10. A ‘conditioned’ soft feel was observed on each hair tress as the sample was applied and after it was rinsed off.
- Conclusions : The overall performance of the lamellar gels for hair conditioning can be engineered through optimization of the formulation microstructure and formulation microstructure breakdown on dilution.Note de contenu : - Objectives : The main objective of this paper was to optimize hair conditioner performance through variation of composition utilizing automated cosmetic formulation platform and advanced characterization techniques as well as develop understanding of how performance (wet combing and wet lubrication) of hair conditioner is affected by its rheology (i.e. yield stress) and controlled breakdown of the formulations (dilution). The experimental results show that yield stress greatly impacts rheology, stability and performance of the lamellar gels for hair conditioning.
- Methods : All samples were prepared on the Chemspeed Flex Formax. A mechanical rheometer was used to measure bulk viscosity and yield stress in each sample. Dia-stron tensile tester was used to measure the lamellar gels ability to reduce combing force. Potential stronger lamellar gel network formation in the formed lamellar gels potentially leads to higher yield stress exhibited. Viscosity values were also measured after a controlled breakdown (i.e. dilution) of each sample. This was also carried out using a mechanical rheometer.
- Results : Yield stress of the formulations was engineered through composition variation and was recorded in each system. The highest yield stress value is 251.179 Pa at a BTAC/CA ratio of 6:10, and the lowest yield stress is 50.14 Pa at a BTAC/CA ratio of 6:5. The highest yield stress value is 50.14 Pa at a CTAC/CA ratio of 6:10, and the lowest yield stress is 19.98 Pa at a CTAC/CA ratio of 2:10. The highest overall yield stress values can also be observed in the BTAC/CA system, whereas the CTAC/CA system has relatively lower yield stress values. Dilution of each formulation caused a breakdown in viscosity of each formulation with the formulations with highest yield stress maintaining higher viscosity than the other formulations. The formulations with highest yield stress in each system which also maintains the highest dilution viscosity (6% BTAC/10% CA and 6% CTAC/10% CA) have the best effect on reducing overall combing force, that is from dry hair tress to wet hair tress and after product is rinsed off. At a BTAC/CA system of ratio 6:5, there is an 89% reduction in combing force and a 95% reduction in combing force in the BTAC/CA system of ratio 6:10. At a CTAC/CA system of ratio 2:10, there is a 65% reduction in combing force and a 88% reduction in combing force in the CTAC/CA system of ratio 6:10. A ‘conditioned’ soft feel was observed on each hair tress as the sample was applied and after it was rinsed off.
- Conclusions : The overall performance of the lamellar gels for hair conditioning can be engineered through optimization of the formulation microstructure and formulation microstructure breakdown on dilution.DOI : https://doi.org/10.1111/ics.12609 En ligne : https://drive.google.com/file/d/1eCms_kWzscE6oPauostB7q8_J8tKKwBu/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35273
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 3 (06/2020) . - p. 259-269[article]Modélisation du comportement mécanique de la matrice composite endommagée / Hocine Bourennane in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 28, N° 3 (07-08-09/2018)
[article]
Titre : Modélisation du comportement mécanique de la matrice composite endommagée Type de document : texte imprimé Auteurs : Hocine Bourennane, Auteur ; Djelloul Gueribiz, Auteur ; Ahmed Benchatti, Auteur Année de publication : 2018 Article en page(s) : p. 383-393 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à matrice organique
Composites thermoplastiques -- Propriétés mécaniques
Elasticité
Eléments finis, Méthode des
Endommagement (mécanique)
EpoxydesIndex. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : Dans cette étude nous avons abordé l’effet induit par la présence d’endommagent sur le comportement mécanique du milieu endommagé dans notre cas la matrice du composite. Pour cela une approche analytique est proposée. Le formalisme de cette approche est établit en se basant sur les notions de la mécanique de rupture et le concept de complaisance tout en supposant l’endommagement sous forme d’une fissure ellipsoïdale. L’effet est quantifié directement sur les constantes élastiques et particulièrement sur le module de Young. Le but est de déterminer pour une fraction volumique donnée de cette fissure, le module de Young effectif de la matrice endommagée. Cette approche nous a permis de déterminer les trois composantes du module de Young pour la matrice endommagée. La comparaison des résultats issus de cette approche avec les résultats des approches d’homogénéisation classiques d’une part et ceux obtenus par l’approche d’homogénéisation par éléments finis d’autre part révèlent que l’approche proposée est plus représentative pour le cas réel des fissures. En plus cette approche nous permettra de proposer des nouvelles expressions pour les paramètres d’endommagement. DOI : 10.3166/rcma.28.383-393 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32572
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 28, N° 3 (07-08-09/2018) . - p. 383-393[article]Réservation
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