Effect of fiber percentage and stacking sequence on mechanical performance of unidirectional hemp and palmyra reinforced hybrid composites / Varanasi Lakshmi Narayana in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 30, N° 3-4 (08/2020)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 30, N° 3-4 (08/2020) . - p. 143-151 Titre : Effect of fiber percentage and stacking sequence on mechanical performance of unidirectional hemp and palmyra reinforced hybrid composites Type de document : texte imprimé Auteurs : Varanasi Lakshmi Narayana, Auteur ; Lokavarapu Bhaskara Rao, Auteur ; Siva Bhaskara Rao Devireddy, Auteur Année de publication : 2020 Article en page(s) : p. 143-151 Note générale : Bibliogr. Langues : Français (fre) Catégories : Chanvre et constituants Le chanvre ou chanvrier (Cannabis sativa L.) est la seule espèce du genre botanique Cannabis. Ce terme latin est souvent utilisé aussi comme nom vernaculaire pour distinguer les variétés de chanvre cultivé à usage industriel des variétés de cannabis à usage récréatif ou médical. C'est une espèce de plante annuelle, de la famille des Cannabaceae. La graine de chanvre s'appelle le chènevis. Composites à fibres végétales -- Propriétés mécaniques Essais dynamiques Fibres de chanvre Humidité -- Absorption:Eau -- Absorption Microscopie électronique à balayage Index. décimale : 668.4 Plastiques, vinyles Résumé : The use of natural fiber reinforced composites gains attention due to its weight and reasonable strength in the recent years. Generally, the mechanical performance of the hybrid composites are superior than the mono fiber reinforced composites. In this work, two different types of natural fibers, namely hemp and palmyra fibers, are selected as reinforcement materials for the development of unidirectional fiber reinforced hybrid composites. Composite laminate was fabricated with four different weight percentages (10 wt.%, 20 wt.%, 30 wt.% and 40 wt.%) and three different hybrid ratios (1:1, 1:2, and 2:1) of hemp and palmyra. The influence of fiber percentage and stacking sequence on the mechanical performance such as tensile strength, flexural strength, impact energy, and hardness of the hybrid composites was evaluated. From the results, it was observed that the adding 30 wt. % of hemp and palmyra fiber can increase the tensile strength and flexural strength by a percentage of 112% and 241% respectively. The impact energy absorption and the hardness of the hybrid composites are examined and compared. The experimental results shows that the hybrid composites containing high fiber weight percentage contribute to significant increase in impact energy and hardness. Morphological analysis is done using Scanning Electron Microscope (SEM). Note de contenu : - EXPERIMENTAL : Materials - Composite preparation Physical and mechanical testing of hybrid composites - RESULTS AND DISCUSSION : Density and void percentage - Water absorption - Tensile strength - Flexural strength - ILSS - Impact energy - Micro hardness - Interfacial analysis using Scanning Electron Microscope - Table 1 : Properties of hemp and palmyra fiber - Table 2. Detailed designation and composition of fabricated composites - Table 3 : Theoretical, experimental densities and void percentage of the composites - Table 4 : Comparison of tensile strength (MPa) of hybrid, hemp and palmyra fiber reinforced composites - Table 5 : Comparison of flexural strength (MPa) of hybrid, hemp and palmyra fiber reinforced composites DOI : https://doi.org/10.18280/rcma.303-405 En ligne : https://www.iieta.org/download/file/fid/39666 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37640 [article]

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