Petrone, Giuseppe (2014) Characterisation of bio-based structures: models and experiments. [Tesi di dottorato]


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Item Type: Tesi di dottorato
Lingua: English
Title: Characterisation of bio-based structures: models and experiments
Date: 31 March 2014
Number of Pages: 121
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Industriale
Scuola di dottorato: Ingegneria industriale
Dottorato: Ingegneria aerospaziale, navale e della qualità
Ciclo di dottorato: 26
Coordinatore del Corso di dottorato:
De Luca,
Franco, FrancescoUNSPECIFIED
Date: 31 March 2014
Number of Pages: 121
Uncontrolled Keywords: natural fibres; biodegrability
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-IND/04 - Costruzioni e strutture aerospaziali
Date Deposited: 07 Apr 2014 12:55
Last Modified: 27 Jan 2015 11:02


Over the last decades the use of natural fibre-reinforced polymer composites (NFCs) has received increased attention and found application in many engineering fields: automotive, trains, marine and aeronautics. In fact, natural fibres, such as flax, cotton, sisal, hemp, etc., have many advantages compared to glass fibres, such as low density, recyclability and cost. Additionally they are renewable raw materials and have high specific strength and stiffness. Their low-density values allow producing composites that combine good mechanical properties with a low specific mass. The present thesis is focussed on characterisation of bio-based structures made of flax fibres reinforced polyethylene resin. The main aim of this dissertation is to evaluate the performance, in terms of vibroacoustic properties, of these structures in order to replace the conventional ones in engineering applications where high load levels are not expected. Several panels were manufactured and tested. Firstly the mechanical properties were carried out by means of the static tests. Than these properties were validated, both numerically and experimentally, by using ultrasonic wave propagation techniques and frequency response functions. Finally, some functional properties, such as acoustic damping, vibration damping and energy absorption, of several bio-based sandwich panels were evaluated investigating the influence of different geometrical and material parameters on functional properties.


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