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Low velocity impact damage assessment in natural fibre biocomposites

Abstract : Natural fibres such as flax are a promising replacement for synthetic fibres in polymer composites and achieve comparable specific properties due to their low density. Recent developments in the production of technical flax fabrics allow the use of sustainable natural fibres in the manufacture of structural composite parts. While biocomposites have been demonstrated to satisfy design and structural integrity requirements, it is suspected that one of the limitations of natural fibre reinforced composites is their impact resistance. In this paper, the impact behaviour of biocomposites made of flax-epoxy and commingled flax and polypropylene fibres is investigated. Composite plates were manufactured using compression moulding process and impact tests at several energies were conducted using an instrumented drop tower. Force and displacement data were obtained from accelerometer measurements and a high speed camera setup was used to observe the bottom surface of the plates during impact. A crack tracking algorithm was developed to identify the initiation and propagation of cracks. The force-displacement curves and high speed camera results were compared for the flax-PP and flax-epoxy composites. The experimental study was supplemented with the finite element modelling of the impact response of biocomposite laminates. There was a good correlation found between the impact measurements and the FE simulations.
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Submitted on : Thursday, August 18, 2022 - 11:20:13 AM
Last modification on : Saturday, August 20, 2022 - 3:06:07 AM

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  • HAL Id : hal-03753375, version 1

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Karthik Ram Ramakrishnan, Stéphane Corn, Nicolas Le Moigne, Pierre Slangen. Low velocity impact damage assessment in natural fibre biocomposites. ICCM21 - 21st International Conference on Composite Materials, Aug 2017, Xi'an, China. ⟨hal-03753375⟩

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