In situ observations of microscale damage evolution in unidirectional natural fibre composites

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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@article{467902b51feb42048621dc67ca1bc197,
title = "In situ observations of microscale damage evolution in unidirectional natural fibre composites",
keywords = "Flax fibres, Fracture, Microstructures, Synchrotron X-ray tomography",
publisher = "Pergamon",
author = "Morten Rask and Bo Madsen and Sørensen, {Bent F.} and Fife, {Julie L.} and Karolina Martyniuk and Lauridsen, {Erik Mejdal}",
year = "2012",
doi = "10.1016/j.compositesa.2012.02.007",
volume = "43",
number = "10",
pages = "1639--1649",
journal = "Composites Part A: Applied Science and Manufacturing",
issn = "1359-835X",

}

RIS

TY - JOUR

T1 - In situ observations of microscale damage evolution in unidirectional natural fibre composites

A1 - Rask,Morten

A1 - Madsen,Bo

A1 - Sørensen,Bent F.

A1 - Fife,Julie L.

A1 - Martyniuk,Karolina

A1 - Lauridsen,Erik Mejdal

AU - Rask,Morten

AU - Madsen,Bo

AU - Sørensen,Bent F.

AU - Fife,Julie L.

AU - Martyniuk,Karolina

AU - Lauridsen,Erik Mejdal

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - Synchrotron X-ray tomographic microscopy (XTM) has been used to observe in situ damage evolution in unidirectional flax fibre yarn/polypropylene composites loaded in uniaxial tension at stress levels between 20% and 95% of the ultimate failure stress. XTM allows for 3D visualization of the internal damage state at each stress level. The overall aim of the study is to gain a better understanding of the damage mechanisms in natural fibre composites. This is necessary if they are to be optimized to fulfil their promising potential. Three dominating damage mechanisms have been identified: (i) interface splitting cracks typically seen at the interfaces of bundles of unseparated fibres, (ii) matrix shear cracks, and (iii) fibre failures typically seen at fibre defects. Based on the findings in the present study, well separated fibres with a low number of defects are recommended for composite reinforcements.

AB - Synchrotron X-ray tomographic microscopy (XTM) has been used to observe in situ damage evolution in unidirectional flax fibre yarn/polypropylene composites loaded in uniaxial tension at stress levels between 20% and 95% of the ultimate failure stress. XTM allows for 3D visualization of the internal damage state at each stress level. The overall aim of the study is to gain a better understanding of the damage mechanisms in natural fibre composites. This is necessary if they are to be optimized to fulfil their promising potential. Three dominating damage mechanisms have been identified: (i) interface splitting cracks typically seen at the interfaces of bundles of unseparated fibres, (ii) matrix shear cracks, and (iii) fibre failures typically seen at fibre defects. Based on the findings in the present study, well separated fibres with a low number of defects are recommended for composite reinforcements.

KW - Flax fibres

KW - Fracture

KW - Microstructures

KW - Synchrotron X-ray tomography

U2 - 10.1016/j.compositesa.2012.02.007

DO - 10.1016/j.compositesa.2012.02.007

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

SN - 1359-835X

IS - 10

VL - 43

SP - 1639

EP - 1649

ER -