Synchrotron micro-CT in kink-band formation of UD-CFRP laminates with microdefects

Jiraphant Srisuriyachot; Jean Bénézech; Guillaume Couégnat; Sophie a.m. Mcnair; Thomas Maierhofer; Richard Butler; Alexander j.g. Lunt

doi:10.1016/j.compositesb.2023.111038

Synchrotron micro-CT in kink-band formation of UD-CFRP laminates with microdefects

Jiraphant Srisuriyachot
, Jean Bénézech
, Guillaume Couégnat
, Sophie a.m. Mcnair
, Thomas Maierhofer
, Richard Butler
, Alexander j.g. Lunt

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

25 Citations (SciVal)

Abstract

This paper presents the first synchrotron micro-Computed Tomography (micro-CT) study on in-situ pure compressive kink-band failure in Uni-Directional Carbon Fibre-Reinforced Polymer composites (UD-CFRPs) with a notch. The study compares the failure behaviour of baseline samples under standard conditions with defect-rich samples containing micro-defects such as voids and fibre misalignment. Quantitative image-based analysis using the structure tensor technique and Digital Volume Correlation (DVC) reveals changes in fibre orientation and localised strain, respectively, at each increment load. A large 400µm kink-band inclined at 30° with a half-cosine wave fibre orientation is observed in the baseline samples, while the defect-rich samples form narrower conjugate kink bands (ranging from 77 µm 25 µm) inclined at 45°. Development of kink-band formations/failure of both samples is discussed and compared with literature, providing key implications for the design and safe use of this type of composite layup.

Original language	English
Article number	111038
Number of pages	14
Journal	Composites Part B: Engineering
Volume	266
Early online date	10 Oct 2023
DOIs	https://doi.org/10.1016/j.compositesb.2023.111038
Publication status	Published - 1 Nov 2023

Data Availability Statement

Datasets related to this article can be found at https://doi.org/10.15125/BATH-01313, hosted at Bath: University of Bath Research Data Archive.

Funding

This work was supported by the UKRI - Engineering and Physical Sciences Research Council, United Kingdom, Grant ‘Certification for Design - Reshaping the Testing Pyramid’ EP/S017038/1. Jiraphant Srisuriyachot is funded by GKN Aerospace, United Kingdom. The Diamond Light Source is acknowledged for providing the beamtime on I13-2 beamline under the experiment number MG28362-2.

Keywords

A. Carbon fibre
B. Defects
C. Micro-mechanics
D. Non-destructive testing
Kink-band formation

ASJC Scopus subject areas

Mechanics of Materials
Ceramics and Composites
Mechanical Engineering
Industrial and Manufacturing Engineering

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https://linkinghub.elsevier.com/retrieve/pii/S1359836823005413Licence: CC BY

Cite this

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title = "Synchrotron micro-CT in kink-band formation of UD-CFRP laminates with microdefects",

abstract = "This paper presents the first synchrotron micro-Computed Tomography (micro-CT) study on in-situ pure compressive kink-band failure in Uni-Directional Carbon Fibre-Reinforced Polymer composites (UD-CFRPs) with a notch. The study compares the failure behaviour of baseline samples under standard conditions with defect-rich samples containing micro-defects such as voids and fibre misalignment. Quantitative image-based analysis using the structure tensor technique and Digital Volume Correlation (DVC) reveals changes in fibre orientation and localised strain, respectively, at each increment load. A large 400µm kink-band inclined at 30° with a half-cosine wave fibre orientation is observed in the baseline samples, while the defect-rich samples form narrower conjugate kink bands (ranging from 77 µm 25 µm) inclined at 45°. Development of kink-band formations/failure of both samples is discussed and compared with literature, providing key implications for the design and safe use of this type of composite layup.",

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AU - Mcnair, Sophie a.m.

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Synchrotron micro-CT in kink-band formation of UD-CFRP laminates with microdefects

Abstract

Data Availability Statement

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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