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

DOI: 10.1016/j.compositesb.2023.111038
Data DOI: 10.15125/BATH-01313

Authors: Jiraphant Srisuriyachot (University of Bath) , Jean Bénézech (University of Bath) , Guillaume Couégnat (UMR5801 CNRS/Univ. Bordeaux/Safran/CEA) , Sophie A. M. Mcnair (University of Bath) , Thomas Maierhofer (University of Bath) , Richard Butler (University of Bath) , Alexander Lunt (University of Bath)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Composites Part B: Engineering , VOL vol. 1

State: Published (Approved)
Published: October 2023
Diamond Proposal Number(s): 28362

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 400 m 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 m 25 m) 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.

Journal Keywords: A. carbon fibre; B. defects; C. micro-mechanics; D. non-destructive testing; Kink-band formation

Subject Areas: Materials, Engineering


Instruments: I13-2-Diamond Manchester Imaging

Added On: 11/10/2023 11:54

Documents:
1-s2.0-S1359836823005413-main.pdf

Discipline Tags:

Materials Engineering & Processes Materials Science Engineering & Technology Composite Materials Polymer Science

Technical Tags:

Imaging Tomography