Low energy impact and tensile stress of hemp fibre reinforced bioepoxi laminates before and after seawater immersion
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Universidad Santo Tomás. Seccional Bucaramanga
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Este trabajo de investigación pretende estudiar el efecto del agua de mar en las propiedades mecánicas de un nuevo biocomposite. Dicho material se ha fabricado mediante el proceso de infusión de una resina bioepoxi (SuperSap®) reforzada con fibra natural de cáñamo tipo “mat”. Para el estudio, se sumergió en agua de mar durante un periodo de bioactividad marina de seis meses. Posteriormente, se sometió al material seco y, tras su inmersión en agua de mar, a un ensayo de impacto por caída de dardo con una energía de E0= 20J a temperatura ambiente T= 23ºC. Además se realizaron ensayos normalizados de resistencia a tracción y se observaron las superficies de rotura al Microscopio Electrónico de Barrido (SEM). Los resultados muestran una pérdida de rigidez del material debido a la degradación provocada por el agua de mar. Se observa también que la absorción de humedad da lugar a un aumento de la energía de impacto disipada por el nuevo biocomposite.
This experimental work is aimed at the mechanical characterization of a new biocomposite. Such material is a no-woven hemp fibre reinforced bioepoxi (SuperSap®) manufactured by infusion. The laminate was immersed in seawater during a bioactivity period of six months. The impact behavior, before and after seawater immersion, under low-velocity impact at E0=20J and environment temperature of T=23ºC was investigated. Besides, tensile stress tests were performed and the breaking surfaces were observed by Scanning Electron Microscopy (SEM). The results show stiffness lost due to resin degradation after seawater immersion. The water absorption pattern of the new biocomposite leads to increase the dissipated impact energy.
This experimental work is aimed at the mechanical characterization of a new biocomposite. Such material is a no-woven hemp fibre reinforced bioepoxi (SuperSap®) manufactured by infusion. The laminate was immersed in seawater during a bioactivity period of six months. The impact behavior, before and after seawater immersion, under low-velocity impact at E0=20J and environment temperature of T=23ºC was investigated. Besides, tensile stress tests were performed and the breaking surfaces were observed by Scanning Electron Microscopy (SEM). The results show stiffness lost due to resin degradation after seawater immersion. The water absorption pattern of the new biocomposite leads to increase the dissipated impact energy.
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Biocomposite, fibra de cáñamo, resistencia a impacto, resistencia a tracción, Biocomposite, hemp fibre, impact resistance, tensile stress
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