Investigation of flexural properties and failure behaviour of biaxial braided CFRP

Hao Yuan; Rui Cai; Qingshi Meng; Lin Wang

doi:10.1016/j.polymertesting.2020.106545

Investigation of flexural properties and failure behaviour of biaxial braided CFRP

Hao Yuan, Rui Cai, Qingshi Meng, Lin Wang

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Abstract

In this research, the experimental tests of quasi-static three-point bending and three-point bending fatigue were carried out for a ±25° biaxial braided carbon fibre reinforced polymer (CFRP) manufactured using vacuum assisted resin transfer moulding (VARTM). A finite element (FE) model was also set up for quasi-static testing and the prediction results revealed that local fibre volume fraction (FVF) is a primary source affecting the mechanical properties of braided CFRP. The fatigue of the braided CFRP was defined as three different stages according to the flexural modulus results. The damage modes of the test specimens were observed via a digital microscope and scanning electron microscope (SEM) and the process-induced defects were summarised. With compiled results and observations, this study provides a better understanding of failure and fatigue behaviour of biaxial braided composites and their flexural properties which offers a good basis for any further research in fibre volume fractions, structure design and manufacturing for braided CFRP.

Original language	English
Article number	106545
Journal	Polymer Testing
Volume	87
Early online date	11 Apr 2020
DOIs	https://doi.org/10.1016/j.polymertesting.2020.106545
Publication status	Published - Jul 2020

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Polymer Testing,. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Polymer Testing, 87, (2020) DOI: 10.1016/j.polymertesting.2020.106545

© 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

Biaxial braided CFRP
Fibre volume fraction (FVF)
Three-point bending
Finite element analysis (FEA)

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10.1016/j.polymertesting.2020.106545

Post-PrintAccepted author manuscript, 1.66 MBLicence: CC BY-NC-ND

Cite this

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title = "Investigation of flexural properties and failure behaviour of biaxial braided CFRP",

abstract = "In this research, the experimental tests of quasi-static three-point bending and three-point bending fatigue were carried out for a ±25° biaxial braided carbon fibre reinforced polymer (CFRP) manufactured using vacuum assisted resin transfer moulding (VARTM). A finite element (FE) model was also set up for quasi-static testing and the prediction results revealed that local fibre volume fraction (FVF) is a primary source affecting the mechanical properties of braided CFRP. The fatigue of the braided CFRP was defined as three different stages according to the flexural modulus results. The damage modes of the test specimens were observed via a digital microscope and scanning electron microscope (SEM) and the process-induced defects were summarised. With compiled results and observations, this study provides a better understanding of failure and fatigue behaviour of biaxial braided composites and their flexural properties which offers a good basis for any further research in fibre volume fractions, structure design and manufacturing for braided CFRP.",

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author = "Hao Yuan and Rui Cai and Qingshi Meng and Lin Wang",

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AU - Yuan, Hao

AU - Cai, Rui

AU - Meng, Qingshi

AU - Wang, Lin

N1 - NOTICE: this is the author’s version of a work that was accepted for publication in Polymer Testing,. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Polymer Testing, 87, (2020) DOI: 10.1016/j.polymertesting.2020.106545 © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

PY - 2020/7

Y1 - 2020/7

N2 - In this research, the experimental tests of quasi-static three-point bending and three-point bending fatigue were carried out for a ±25° biaxial braided carbon fibre reinforced polymer (CFRP) manufactured using vacuum assisted resin transfer moulding (VARTM). A finite element (FE) model was also set up for quasi-static testing and the prediction results revealed that local fibre volume fraction (FVF) is a primary source affecting the mechanical properties of braided CFRP. The fatigue of the braided CFRP was defined as three different stages according to the flexural modulus results. The damage modes of the test specimens were observed via a digital microscope and scanning electron microscope (SEM) and the process-induced defects were summarised. With compiled results and observations, this study provides a better understanding of failure and fatigue behaviour of biaxial braided composites and their flexural properties which offers a good basis for any further research in fibre volume fractions, structure design and manufacturing for braided CFRP.

AB - In this research, the experimental tests of quasi-static three-point bending and three-point bending fatigue were carried out for a ±25° biaxial braided carbon fibre reinforced polymer (CFRP) manufactured using vacuum assisted resin transfer moulding (VARTM). A finite element (FE) model was also set up for quasi-static testing and the prediction results revealed that local fibre volume fraction (FVF) is a primary source affecting the mechanical properties of braided CFRP. The fatigue of the braided CFRP was defined as three different stages according to the flexural modulus results. The damage modes of the test specimens were observed via a digital microscope and scanning electron microscope (SEM) and the process-induced defects were summarised. With compiled results and observations, this study provides a better understanding of failure and fatigue behaviour of biaxial braided composites and their flexural properties which offers a good basis for any further research in fibre volume fractions, structure design and manufacturing for braided CFRP.

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Investigation of flexural properties and failure behaviour of biaxial braided CFRP

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Rui Cai

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Investigation of flexural properties and failure behaviour of biaxial braided CFRP

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Rui Cai

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