Woven hemp fabric reinforced polylactic acid composites with different fibre volume fraction (20, 30 and 40%) were manufactured by compression moulding process. To better understand the industrial application limits of the investigated bio-composite, flexural and impact properties were determined and compared to those of the unreinforced bio-polymer and the creep behaviour at different values of temperature was widely investigated adopting the Arrhenius theory. In addition, to predict the long-term mechanical performance of the investigated bio-composite, the possibility to use the Time-Temperature Superposition model was investigated. For this purpose, Dynamic-Mechanical tests were conducted to evaluate the activation energy and then to apply the Time-Temperature Superposition model to the compliance curves, obtained by short-time creep tests under different load conditions. Therefore, to examine the validity of the theoretical model, experimental long-time tests were also carried out. The results show interesting mechanical properties and a good fit between the theoretical and the experimental creep curves, particularly when the fibre volume fraction was equal to 20 and 30%.

Creep Behaviour of Polylactic Acid reinforced by Woven Hemp Fabric / Durante, Massimo; Formisano, Antonio; Boccarusso, Luca; Langella, Antonio; Carrino, Luigi. - In: COMPOSITES. PART B, ENGINEERING. - ISSN 1359-8368. - 124:(2017), pp. 16-22. [10.1016/j.compositesb.2017.05.038]

Creep Behaviour of Polylactic Acid reinforced by Woven Hemp Fabric

DURANTE, MASSIMO;FORMISANO, ANTONIO
;
BOCCARUSSO, LUCA;LANGELLA, ANTONIO;CARRINO, LUIGI
2017

Abstract

Woven hemp fabric reinforced polylactic acid composites with different fibre volume fraction (20, 30 and 40%) were manufactured by compression moulding process. To better understand the industrial application limits of the investigated bio-composite, flexural and impact properties were determined and compared to those of the unreinforced bio-polymer and the creep behaviour at different values of temperature was widely investigated adopting the Arrhenius theory. In addition, to predict the long-term mechanical performance of the investigated bio-composite, the possibility to use the Time-Temperature Superposition model was investigated. For this purpose, Dynamic-Mechanical tests were conducted to evaluate the activation energy and then to apply the Time-Temperature Superposition model to the compliance curves, obtained by short-time creep tests under different load conditions. Therefore, to examine the validity of the theoretical model, experimental long-time tests were also carried out. The results show interesting mechanical properties and a good fit between the theoretical and the experimental creep curves, particularly when the fibre volume fraction was equal to 20 and 30%.
2017
Creep Behaviour of Polylactic Acid reinforced by Woven Hemp Fabric / Durante, Massimo; Formisano, Antonio; Boccarusso, Luca; Langella, Antonio; Carrino, Luigi. - In: COMPOSITES. PART B, ENGINEERING. - ISSN 1359-8368. - 124:(2017), pp. 16-22. [10.1016/j.compositesb.2017.05.038]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/675394
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