Modulating impact resistance of flax epoxy composites with thermoplastic interfacial toughening

Farzin 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

Farzin Javanshour^*
, 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

Tampere University
Katholieke Universiteit Leuven (KU Leuven)
Lappeenranta-Lahti University of Technology LUT

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

30 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

Funding

This project is funded by the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 764713-FibreNet. This work made use of Tampere Microscopy Center facilities at Tampere University. The authors are grateful to Bcomp (Fribourg, Switzerland) for supplying the flax fabrics and providing valuable insights.

Keywords

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

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10.1016/j.compositesa.2021.106628

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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.",

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author = "Farzin 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, Farzin

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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DO - 10.1016/j.compositesa.2021.106628

M3 - Article

AN - SCOPUS:85113686543

SN - 1359-835X

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JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

M1 - 106628

ER -

Modulating impact resistance of flax epoxy composites with thermoplastic interfacial toughening

Abstract

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Keywords

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Interfacial Toughening Strategies for Impact and Fatigue Tolerant Structural Biocomposites

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