Robotic tow placement for local reinforcement of glass mat thermoplastics (GMTs)

Wakeman, M. D.; Hagstrand, P.‐O.; Bonjour, F.; Bourban, P.-E.; Månson, J.-Å. E.

doi:10.1016/s1359-835x(02)00086-6

Cited by 17 publications

(6 citation statements)

References 7 publications

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“…Wakeman et al. 90 investigated the effect of forming conditions (e.g. preheat cycle, UD tow placement rate and pressure) on the structural integrity (e.g.…”

Section: Hybrid Fibre Architecturesmentioning

confidence: 99%

“…Wakeman et al 15 demonstrated significant stiffness improvements and feasibility of processing carbon fibre-reinforced polyamide materials with ribbed structures in short times using three steps: plate impregnation, stamping, and over-moulding (Figure 18(b)). Wakeman et al 90 investigated the effect of forming conditions (e.g. preheat cycle, UD tow placement rate and pressure) on the structural integrity (e.g.…”

Section: Processing Studiesmentioning

confidence: 99%

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Mechanical characterisation and modelling of randomly oriented strand architecture and their hybrids – A general review

Visweswaraiah

Selezneva

Lessard

et al. 2018

Journal of Reinforced Plastics and Composites

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A comprehensive review of the mechanical characterisation and modelling of randomly oriented strand material architecture and their hybrids with laminates is presented. Randomly oriented strand composites are long discontinuous fibre systems that exhibit excellent formability characteristics and stiffness properties comparable to quasi-isotropic laminates, allowing their use in the manufacture of intricate geometric parts for automotive and aerospace industries. Randomly oriented strand architecture complements out-of-autoclave methods such as compression moulding, thermostamping and resin-transfer moulding leading to cost-reduction. Their applicability is limited to non-structural and low-load bearing applications due to their low strength properties. Continuous fibre aerospace preforms exhibiting excellent mechanical performance possess low formability characteristics and are confined to simple shell-like geometries with minimal curvatures, while incurring high-costs and long manufacturing times. Hybridisation of randomly oriented strand and with other material architectures represents trade-off solutions of formability and performance characteristics often yielding synergistic effects. Seemingly simple, randomly oriented strand architecture is a complex material system that poses several structural and process challenges. This work categorises the pertinent research work from the literature on the mechanical characterisation into the framework of a formal characterisation environment of composite structures that includes the coupon, the part and structural levels. The manufacturing, dispersion methods and measurement techniques are qualitatively assessed with reference to the mechanical properties. The discussion on modelling involves the identification of crucial characteristics of significant analytical and numerical modelling techniques devised for the prediction of the mechanical behaviour of randomly oriented strand composites and their hybrids. Emphasis is on the methods of stiffness and strength prediction. Our perspectives on the effective use of randomly oriented strand composites and their hybrids are discussed. Process characterisation and process modelling of randomly oriented strand composites and their hybrids are beyond the scope of this article.

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“…Wakeman et al. 90 investigated the effect of forming conditions (e.g. preheat cycle, UD tow placement rate and pressure) on the structural integrity (e.g.…”

Section: Hybrid Fibre Architecturesmentioning

confidence: 99%

Section: Processing Studiesmentioning

confidence: 99%

Mechanical characterisation and modelling of randomly oriented strand architecture and their hybrids – A general review

Visweswaraiah

Selezneva

Lessard

et al. 2018

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

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“…Among hospital-acquired infections, medical device-related infections (MDIs) have been recognized as one of the rapidly growing and significant issues, especially for some permanent devices that come in intimate contact with the human body. The bacterial colonization of the medical device not only precedes the infection but can also negatively affect the function of a device [6,7]. Polymeric materials for medical applications have a long history, leading to the fact that currently more than 50% of all medical devices are made of polymers.…”

Section: Introductionmentioning

confidence: 99%

Rigid antimicrobial polimeric composite with PVC matrix and ZnO and TiO2 functionalized nanoparticles

Alexandrescu¹,

Georgescu²,

Sönmez³

et al. 2019

LFJ

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In this paper, rigid antimicrobial polymeric nanocomposites were developed-polymeric material based on chemically functionalized nanoparticles with polydimethylsiloxane (PDMS)-dispersed in a plastomer matrix. By dispersing them in plastomer matrix (polyvinyl chloride-PVC), hybrid TiO 2 /ZnO nanoparticles (50:50) (fillers) functionalized for good compatibility have led to the development of an advanced polymeric material with antibacterial, multifunctional and processing properties specific to plastics. Experimental polymeric materials are adapted to biomedical and food applications, therefore, they were tested for stability and long-term antimicrobial activity. The combined effects of functionalised nanoparticles and polymer on the structure and properties of new experimental materials were studied. Experimental nanocomposites were morpho-structurally, microbiologically and physico-mechanically characterized. KEY WORDS: nanocomposite, antibacterial, functionalized, rigid COMPOZIT POLIMERIC RIGID ANTIMICROBIAN ÎN MATRICE DE PVC ŞI NANOPARTICULE DE ZnO ŞI TiO 2 FUNCŢIONALIZATE REZUMAT. În această lucrare s-au realizat nanocompozite polimerice antimicrobiene rigide-material polimeric bazat pe nanoparticule funcţionalizate chimic cu polidimetil siloxan (PDMS)-dispersate într-o matrice de plastomer. Prin dispersarea lor în matrice de plastomer (clorură de polivinil-PVC), nanoparticulele hibride TiO 2 /ZnO (50:50) (materiale de umplere) funcţionalizate pentru o bună compatibilizare au condus la obţinerea unui material polimeric avansat cu caracteristici antibacteriene, multifuncţionale şi proprietăţi de prelucrare specifice materialelor plastice. Materialele polimerice experimentate sunt adaptate aplicaţiilor biomedicale şi alimentare, prin urmare, au fost testate din punct de vedere al stabilităţii şi activităţii antimicrobiene pe termen lung. Au fost studiate efectele combinate ale nanoparticulelor funcţionalizate şi ale polimerului asupra structurii şi proprietăţilor materialelor noi experimentate. Nanocompozitele experimentate au fost caracterizate morfo-structural, microbiologic şi fizico-mecanic. CUVINTE CHEIE: nanocompozite, antibacterian, funcţionalizat, rigid COMPOSITE POLYMÉRIQUE ANTIMICROBIEN RIGIDE EN PVC ET NANOPARTICULES DE ZnO ET TiO 2 FONCTIONNALISÉES RÉSUMÉ. Dans cet article, on a développé des nanocomposites polymères antimicrobiennes rigides-matériau polymérique à base de nanoparticules chimiquement fonctionnalisées avec du polydiméthylsiloxane (PDMS)-dispersés dans une matrice de plastomère. En les dispersant dans une matrice de plastomère (polychlorure de vinyle-PVC), les nanoparticules hybrides de TiO 2 /ZnO (50:50) fonctionnalisées pour une bonne compatibilité ont conduit au développement d'un matériau polymère avancé doté de propriétés antibactériennes, multifonctionnelles et propriétés de traitement spécifiques aux plastiques. Les matériaux polymères expérimentaux sont adaptés aux applications biomédicales et alimentaires. Ils ont donc été testés pour déterminer leur stabilité et leur activité ...

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“…Polymer nanocomposites containing graphite were considered a new generation of composite materials due to their unique properties, attributed to the high aspect ratio of inorganic granules [4,5]. Graphite nanoparticles are used as reinforcement in fabrication of polymer composites to enhance mechanical, electrical and thermal properties [6][7][8][9][10]. Some researchers tested the mechanical properties of high density polyethylene nanocomposites reinforced with graphite [11][12][13][14] or oxidized graphite [15].…”

Section: Introductionmentioning

confidence: 99%

Polyamide/polyethylene/graphite nanocomposites: development and morpho-structural and physical-mechanical characterisation

Alexandrescu¹,

Georgescu²,

Sönmez³

et al. 2018

LFJ

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This paper presents the development of bipolymer nanopolymers-polyamide and polyethylene-compatibilised with polyethylenegraft-maleic anhydride and graphite nanoparticles. Polyamide/polyethylene (PA/PE) composites are studied because both components are relatively inexpensive, advantageous and are processed by injection. Compatibilisation of binary polymer compounds can be accomplished by adding a grafted copolymer, the segments of which have physical or chemical affinity with the two immiscible homopolymers. In this case, polyethylene-graft-maleic anhydride (PE-g-MA) was used. Graphite-containing polymer composites are considered a new generation of materials with predefined properties, in this case, resistance to impact. The combined effects of graphite and compatibilizing polymer (PE-g-MA) were studied on the structure and properties of the new materials. The tested nanocomposites were characterized morpho-structurally (SEM, FT-IR spectrometry) and physico-mechanically. KEY WORDS: nanocomposites, compatibiliser, graphite, morpho-strucutral characterisation, bipolymer NANOCOMPOZITE POLIAMIDĂ/POLIETILENĂ/GRAFIT: REALIZARE ŞI CARACTERIZARE MORFO-STRUCTURALĂ ŞI FIZICO-MECANICĂ REZUMAT. În această lucrare se prezintă realizarea unor nanocompozite bipolimerice-poliamidă şi polietilenă-compatibilizate cu polietilenă grefată cu anhidridă maleică şi nanoparticule de grafit. Compozitele din poliamidă/polietilenă (PA/PE) sunt studiate deoarece ambele componente sunt relativ ieftine, cu proprietăţi avantajoase şi sunt prelucrate prin injecţie. Compatibilizarea compuşilor polimeri binari poate fi realizată prin adăugarea unui copolimer grefat, ale cărui segmente au afinitate fizică sau chimică cu cei doi homopolimeri imiscibili. În acest caz, s-a utilizat polietilenă grefată cu anhidridă maleică (PE-g-MA). Compozitele polimere conţinând grafit sunt considerate o nouă generaţie de materiale cu proprietăţi prestabilite, în acest caz de rezistenţă la impact. Au fost studiate efectele combinate ale grafitului şi polimerul compatibilizator (PE-g-MA) asupra structurii şi proprietăţilor materialelor noi experimentate. Nanocompozitele experimentate au fost caracterizate morfo-structural (SEM, spectrometrie FT-IR) şi fizico-mecanic. CUVINTE CHEIE: nanocompozite, compatibilizator, grafit, caracterizare morfo-structurală, bipolimer NANOCOMPOSITES POLYAMIDE/POLYÉTHYLÈNE/GRAPHITE: RÉALISATION ET CARACTÉRISATION MORPHO-STRUCTURELLE ET PHYSICO-MECANIQUE RÉSUMÉ. Dans cet article on présente la réalisation des nanopcomposites bipolymères-polyamide et polyéthylène-compatibilisés avec le polyéthylène greffé avec de l'anhydride maléique et des nanoparticules de graphite. Les composites polyamide/polyéthylène (PA/PE) sont étudiés car les deux composants sont relativement peu coûteux, avantageux et sont traités par injection. La compatibilité des composés polymères binaires peut être réalisée en ajoutant un copolymère greffé dont les segments ont une affinité physique ou chimique avec les deux homopolymères non miscibles. Dans ce cas, du polyét...

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Robotic tow placement for local reinforcement of glass mat thermoplastics (GMTs)

Cited by 17 publications

References 7 publications

Mechanical characterisation and modelling of randomly oriented strand architecture and their hybrids – A general review

Mechanical characterisation and modelling of randomly oriented strand architecture and their hybrids – A general review

Rigid antimicrobial polimeric composite with PVC matrix and ZnO and TiO2 functionalized nanoparticles

Polyamide/polyethylene/graphite nanocomposites: development and morpho-structural and physical-mechanical characterisation

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