Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 152, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2021.106699
Keywords
Transverse matrix cracking; XCT analysis; Resin transfer moulding (RTM); Non-crimp fabrics
Funding
- Regional Government of the Community of Madrid [IND2017/IND-7727]
- Hexcel Corporation
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The micro-crack formation and propagation mechanisms in non-crimp fabric laminates produced by resin transfer moulding and subjected to thermal cycling were characterized using X-ray computed tomography and machine learning algorithms. It was found that the presence of stitching thread induced matrix cracks triggered by temperature drop. This information helps to understand damage progression.
In this work, the micro-crack formation and propagation mechanisms are characterized by X-ray computed tomography (XCT) in non-crimp fabric (NCF) laminates produced by resin transfer moulding (RTM) and subjected to thermal cycling between -55 degrees C and 72 degrees C. The low crimped textile structure has comparable in-plane mechanical properties to their traditional unidirectional angle-ply laminates. However, the presence of the stitching thread induces the generation and progression of damage in the form of matrix cracks triggered by the temperature drop. In this study, matrix cracks are extracted from X-ray computed tomography volumes, using machine learning (ML) algorithms, which helps to deliver robust and reliable crack segmentation as well as geometrical features of the damage shape, size, spatial distribution and density. This information allows understanding damage progression.
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