DOI: 10.5281/zenodo.14770613
title: Supplementary data for study on compressive failure of Uni-Directional Carbon Fibre-reinforced Pultruded Profiles with embedded fuzz ball defects

description: This collection of data/images is supplementary to the work presented in:

O. V. Ferguson, J. Rifai, M. R. Wisnom, J. B. Jørgensen and L. P. Mikkelsen, Compressive behaviour of uni-directional carbon fibre-reinforced pultruded profiles with manufacturing-induced fuzz ball defects. Compos. - A: Appl. Sci. Manuf., 198, 109059, https://doi.org/10.1016/j.compositesa.2025.109059, 2025.

The data/images are sorted according to the topics presented in the paper, and follow the section numbering written below:



Section 2.2.1. Estimation of fibre orientations & Section 3.1. Fibre orientation distribution



Optical microscopy images used for estimating out-of-plane orientations in the vicinity of an artificial fuzz ball defect.



OM_xy_slices.png: Presents the cutting locations across the width of the defect

OM_xy_i.png where i=[1, 2, 3, 4]: Large field of view micrographs in the xy-plane

OM_xy_i_orientations.png where i=[1, 2]: Large field of view micrographs in the xy-plane with fibre orientations plotted on top

orientation_from_micrograph.ipynb: Jupyter notebook demonstration of the structure tensor method used for estimating the fibre orientations








Section 2.2.2. Estimation of fibre volume fraction & Section 3.2. Fibre volume fraction distribution



Optical microscopy images used for estimating fibre volume fraction distributions in the vicinity of an artificial fuzzball defect



OM_yz_slices.png: Presents the cutting locations across the length of the defect

OM_yz_i.png where i=[1, ..., 13]: Large field of view micrographs in the yz-plane

FVF_yz_i.png where i=[1, ..., 13]: Fibre volume fraction distributions estimated for the corresponding micrographs



Colorbar in the image represents the fibre volume fraction, while magenta represents voids



FVF_from_micrograph.ipynb: Jupyter notebook demonstration of the areal method used for estimating the fibre volume fraction distribution








Section 4. Results: Mechanical testing



Images of failed samples from the four-point bending test campaign



Pristine_failure_i.png where i=[1, ..., 5]: Images of failed pristine face sheets



i: corresponds to the sample ID presented in the cited paper.

All beams with pristine face sheets on the compression side fail in the vicinity of the load rollers



Pristine_failure_i.png where i=[6, ..., 14]: Images of failed artificial fuzz ball defect, AFBD, beams



i: corresponds to the sample ID presented in the cited paper



All beams with AFBD facesheets fail in the gauge area
















Optical microscopy images from a failed sample with an embedded artificial fuzz ball defect



Failure_xy_i.png where i=[1, 2, 3, 4]: Large field of view images of an AFBD facesheet failed in compression in the four-point bending test



Experimental results from four-point bending tests and pure compression tests



Beam_test_results.csv : Contains information about final failure and damage initiation for all samples and defect characteristics used for analysis

Pure_compression_test_results.csv : Contains information about normalised strength and strains for all pure compression tests presented



Strains are normalised with respect to the average compressive strain to failure for the Pristine material in the four-point bending test

Strengths are normalised with respect to the mean strength measured in the pure compression test.



Pure_compression_failure_mode.jpg : Image of kink band failure mode beneath the tabbing region on a pure compression test. Similar failure modes are observed for the other samples in the series of 10 specimens.