Mocerino, Davide (2022) On the braiding manufacturing of natural fibers composites. [Tesi di dottorato]


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Item Type: Tesi di dottorato
Resource language: English
Title: On the braiding manufacturing of natural fibers composites
Date: 10 March 2022
Number of Pages: 107
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Chimica, dei Materiali e della Produzione Industrialea
Dottorato: Ingegneria dei prodotti e dei processi industriali
Ciclo di dottorato: 34
Coordinatore del Corso di dottorato:
Langella, AntonioUNSPECIFIED
Date: 10 March 2022
Number of Pages: 107
Keywords: Circular Braiding Process, Cover Factor, Hemp Fibres
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-IND/16 - Tecnologie e sistemi di lavorazione
Date Deposited: 17 Mar 2022 12:40
Last Modified: 28 Feb 2024 10:46

Collection description

This thesis work focuses on the realisation process of braided preforms using hemp fibres. The work can be subdivided into three parts: Section I: Literature review Section II: Comparison of different analytical processes to calculate the value of Cover Factor and developing of a new approach to obtain it. Section III: Mechanical properties of braided hemp preforms. The braiding technique was used to obtain 2D biaxial and triaxial preforms, with a forecasting approach towards the production parameters and the development of a specific tool for it. With the analytical approach developed in the past, it's clear that, especially in the triaxial preforms, there will be some error in the final calculation of Cover Factor, so it has been necessary to find a unique approach that is valid for all the produced cases. The use of the statistical approach, in this case, permits to obtain a value of predicted Cover Factor and consequently of the volumetric percentage of fibres that is really close to the wanted one. This thesis project established a valid method to compare the value of the Cover Factor obtained with the statistical approach and the one obtained in the experimental production. The last part of this work focuses on the study of the mechanical properties of the hemp braided composites, the influence of the value of braiding angle, and the comparison between biaxial and triaxial braided preform with the same Cover Factor that corresponds to the same fibres volume fraction.


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