Impact damage evaluation in woven composites using acoustic and thermoelastic techniques

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Carlo Santulli 22 This can be achieved when the natural fibre (e.g., jute) is employed as a reinforcement of a biopolymer matrix. Combustion of biopolymer (e.g., Biopol®, a bacterial polyester) maintains carbon dioxide neutrality and is completely slag-free (7). Many studies have been performed to investigate the mechanical and structural characteristics of high-tech composites. As a result, current standards and guidelines are generally oriented towards carbon and glass fibre composites. Clearly, low-tech composites are also subjected to severe in-service conditions, and failure to fully characterise their behaviour might result in a reduction in product performance, rendering them less marketable. For example, a natural fibre composite floor covering should be able to resist home heating, withstand dropped objects and withstand people walking on it, etc., during many years of service. 1.2 Impact testing Impact is an event that is frequently observed during the operation of a composite structure. Consider for example the front cab of a high-speed train, this can suffer damage from boulders or objects present on the rail, birds or other animals, hailstorms, etc. Even when the impact event creates non-visible damage in the material, its effect on the mechanical properties of the composite has to be taken into account. As a consequence, an evaluation of the possible effect of impact loading on the properties of a composite structure should be performed.

Anteprima della Tesi di Carlo Santulli

Anteprima della tesi: Impact damage evaluation in woven composites using acoustic and thermoelastic techniques, Pagina 4

Tesi di Dottorato

Dipartimento: Engineering

Autore: Carlo Santulli Contatta »

Composta da 257 pagine.

 

Questa tesi ha raggiunto 511 click dal 20/03/2004.

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