Modulating impact resistance of flax epoxy composites with thermoplastic interfacial toughening

F. Javanshour; A. Prapavesis; T. Pärnänen; O. Orell; M. C. Lessa Belone; R. K. Layek; M. Kanerva; Pasi Kallio; A. W. Van Vuure; Essi Sarlin

doi:10.1016/j.compositesa.2021.106628

Modulating impact resistance of flax epoxy composites with thermoplastic interfacial toughening

F. Javanshour^* (Corresponding Author), A. Prapavesis, T. Pärnänen, O. Orell, M. C. Lessa Belone, R. K. Layek, M. Kanerva, Pasi Kallio, A. W. Van Vuure, Essi Sarlin

^*Corresponding author for this work

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

21 Citations (Scopus)

Abstract

The application of natural flax fibre/epoxy composites is growing in the automotive sector due to their good stiffness and damping properties. However, the impact damage resistance of flax/epoxy composites is limited due to the brittle nature of both epoxy and flax fibres and strong fibre/matrix adhesion. Here, biobased thermoplastic cellulose acetate (CA) is deployed as a fibre treatment to alter the damage development of flax/epoxy composites subjected to low-velocity impact. The perforation threshold energy and the perforation energy of unmodified cross-ply composites increased respectively by 66% and 42% with CA-treated flax fibres. The CA-modification modestly decreased the transverse tensile strength and in-plane tensile shear strength of the composites. However, it altered the brittle nature of flax/epoxy laminates in quasi-static tests into ductile failure with clearly increased fibre–matrix debonding.

Original language	English
Article number	106628
Journal	Composites Part A: Applied Science and Manufacturing
Volume	150
DOIs	https://doi.org/10.1016/j.compositesa.2021.106628
Publication status	Published - Nov 2021
MoE publication type	A1 Journal article-refereed

Keywords

A. Natural fibres
B. Impact behaviour
B. Interface/interphase
E. Surface treatments

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Javanshour, F., Prapavesis, A., Pärnänen, T., Orell, O., Lessa Belone, M. C., Layek, R. K., Kanerva, M., Kallio, P., Van Vuure, A. W., & Sarlin, E. (2021). Modulating impact resistance of flax epoxy composites with thermoplastic interfacial toughening. Composites Part A: Applied Science and Manufacturing, 150, Article 106628. https://doi.org/10.1016/j.compositesa.2021.106628

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title = "Modulating impact resistance of flax epoxy composites with thermoplastic interfacial toughening",

abstract = "The application of natural flax fibre/epoxy composites is growing in the automotive sector due to their good stiffness and damping properties. However, the impact damage resistance of flax/epoxy composites is limited due to the brittle nature of both epoxy and flax fibres and strong fibre/matrix adhesion. Here, biobased thermoplastic cellulose acetate (CA) is deployed as a fibre treatment to alter the damage development of flax/epoxy composites subjected to low-velocity impact. The perforation threshold energy and the perforation energy of unmodified cross-ply composites increased respectively by 66% and 42% with CA-treated flax fibres. The CA-modification modestly decreased the transverse tensile strength and in-plane tensile shear strength of the composites. However, it altered the brittle nature of flax/epoxy laminates in quasi-static tests into ductile failure with clearly increased fibre–matrix debonding.",

keywords = "A. Natural fibres, B. Impact behaviour, B. Interface/interphase, E. Surface treatments",

author = "F. Javanshour and A. Prapavesis and T. P{\"a}rn{\"a}nen and O. Orell and {Lessa Belone}, {M. C.} and Layek, {R. K.} and M. Kanerva and Pasi Kallio and {Van Vuure}, {A. W.} and Essi Sarlin",

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AU - Javanshour, F.

AU - Prapavesis, A.

AU - Pärnänen, T.

AU - Orell, O.

AU - Lessa Belone, M. C.

AU - Layek, R. K.

AU - Kanerva, M.

AU - Kallio, Pasi

AU - Van Vuure, A. W.

AU - Sarlin, Essi

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AB - The application of natural flax fibre/epoxy composites is growing in the automotive sector due to their good stiffness and damping properties. However, the impact damage resistance of flax/epoxy composites is limited due to the brittle nature of both epoxy and flax fibres and strong fibre/matrix adhesion. Here, biobased thermoplastic cellulose acetate (CA) is deployed as a fibre treatment to alter the damage development of flax/epoxy composites subjected to low-velocity impact. The perforation threshold energy and the perforation energy of unmodified cross-ply composites increased respectively by 66% and 42% with CA-treated flax fibres. The CA-modification modestly decreased the transverse tensile strength and in-plane tensile shear strength of the composites. However, it altered the brittle nature of flax/epoxy laminates in quasi-static tests into ductile failure with clearly increased fibre–matrix debonding.

KW - A. Natural fibres

KW - B. Impact behaviour

KW - B. Interface/interphase

KW - E. Surface treatments

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JO - Composites Part A: Applied Science and Manufacturing

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M1 - 106628

ER -

Modulating impact resistance of flax epoxy composites with thermoplastic interfacial toughening

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Keywords

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