An investigation into the effect of adding carbon and glass fibres to UHMWPE fibres on the mechanical characteristics of a sports prosthetic foot / Hayder Kareem Talla in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 2 (04/2022)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 32, N° 2 (04/2022) . - p. 69-76 Titre : An investigation into the effect of adding carbon and glass fibres to UHMWPE fibres on the mechanical characteristics of a sports prosthetic foot Type de document : texte imprimé Auteurs : Hayder Kareem Talla, Auteur ; Abdul Kareem F. Hassan, Auteur ; Jawad Kadhim Oleiwi, Auteur Année de publication : 2022 Article en page(s) : p. 69-76 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse numérique Appareils orthopédiques Composites à fibres de carbone -- Propriétés mécaniques Composites à fibres de verre -- Propriétés mécaniques Eléments finis, Méthode des Essais dynamiques Polyéthylène à ultra haut poids moléculaire Prothèses Stratifiés Index. décimale : 668.4 Plastiques, vinyles Résumé : Due to their qualities and advantages, such as light weight, high rigidity, and high performance, composite materials have been used in a wide variety of industries and sectors. For example, carbon fibres are used in the construction of aircraft, while ultrahigh-molecular-weight polyethylene (UHMWPE) is used in the fabrication of medical artificial joints. In this study, the blade dimensions were estimated using side profiles from a European patent specification and the mechanical properties of numerous layers of composite materials (UHMWPE, carbon, glass fibre, and Perlon) utilized in the fabrication of sports prosthesis were investigated experimentally, theoretically, and numerically, and the results were compared, as well as the theory of failure calculated. The influence of data entered into the ANSYS programme was also investigated in the case of isotropic or orthotropic materials. The findings indicate that longitudinal young modules are experimentally and theoretically equivalent. While the material ISO or Ortho is considered and its information is entered into the ANSYS programme for the same lamina, similar results are obtained under the same boundary condition, as was demonstrated when computing the theory of failure. Additionally, it was demonstrated in this research that layering woven carbon fibre on top of layers of UHMWPE woven fabrics had a greater effect than layering woven glass fibre when fabricating the sports prosthetic foot. Note de contenu : - MATERIALS AND METHODS : Materials chosen - Composite material production - Mechanical testing - DATA REDUCTION : Determination of fiber volume fraction Vf) - Determination of the elastic characteristics - FINITE ELEMENT MODELING - Table 1. Mechanical properties of composite fibers - Table 2. Mechanical properties of the Matrix - Table 3. Types of laminations used in this study for composite material specimens - Table 4. The theoretical property of lamination used in the current study - Table 5. The experimental young modulus of lamination employed in the current study - Table 6. The numerical stress at the x and y directions and shear stress - Table 7. Tsai-Hill results DOI : https://doi.org/10.18280/rcma.320203 En ligne : https://www.iieta.org/download/file/fid/74279 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37699 [article]

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Performance of athletic prosthetic feet made of various composite materials with pmma matrix : numerical and theoretical study / Hayder Kareem Talla in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 4 (08/2021)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 4 (08/2021) . - p. 257-264 Titre : Performance of athletic prosthetic feet made of various composite materials with pmma matrix : numerical and theoretical study Type de document : texte imprimé Auteurs : Hayder Kareem Talla, Auteur ; Jawad Kadhim Oleiwi, Auteur ; Abdul Kareem F. Hassan, Auteur Année de publication : 2021 Article en page(s) : p. 257-264 Note générale : Bibliogr. Langues : Français (fre) Catégories : Composites à fibres de carbone -- Propriétés mécaniques Composites à fibres de verre -- Propriétés mécaniques Polyéthylène à ultra haut poids moléculaire Polyméthacrylate de méthyle Le 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. Prothèses Stratifiés -- Propriétés mécaniques Index. décimale : 668.4 Plastiques, vinyles Résumé : Prosthetic upgrades are specialized prosthetics that enable patients to participate in more demanding recreational activities, such as running. This study examines the use of prosthetic limbs, specifically the athletic prosthetic foot. The current research focused on the manufacturing and production properties of an samples athletic prosthetic Foot made from composite materials based on a polymethyl methacrylate resin (PMMA) reinforced with various fibers (UHMWPE, Perlon, Carbon fiber, and Glass fiber). The finite element method (ANSYS-19R) is used to build an athletic prosthetic model and apply boundary conditions to investigate the influence of deformation and stored energy on the performance of the sports prosthetic foot. Six laminates have been manufactured, and it has been discovered that adding a number of carbon fiber layers to UHMWPE has a better effect on deformation than adding a glass fiber 26% improvement. Furthermore, the findings show there is an improvement in performance when the number of classes was doubled, as the rate of improvement between the laminate to which carbon fibers were added was 31%, and between the laminate to which glass fibers were added by 32% under the same boundary conditions. Note de contenu : - Problem - Description - Experimental work : Material - Equipment - Procedure - Data reduction - Numerical implementation : Mesh sizing - Results and Discussion - Table 1 : The mechanical properties of materials - Table 2 : Types of laminations for laminated composite specimens in this study - Table 3 : The mechanical properties of laminate DOI : https://doi.org/10.18280/rcma.310410 En ligne : https://www.iieta.org/download/file/fid/60236 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37676 [article]

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