Torsion damage mechanisms analysis of two-dimensional braided composite tubes with digital image correction and X-ray micro-computed tomography

This paper investigates the torsion progressive damage and failure mechanism of two-dimensional (2D) braided carbon/epoxy composite tubes. Four kind of samples with four braiding angles, 30°, 45°, 55°, and 60°, are experimentally tested on the static torsion machine. Three-dimensional digital image...

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Bibliographic Details
Published in:Composite structures 2021-01, Vol.256, p.113020, Article 113020
Main Authors: Gu, Yuanhui, Zhang, Diantang, Zhang, Zhongwei, Sun, Jie, Yue, Songlin, Li, Gan, Qian, Kun
Format: Article
Language:English
Subjects:
Braided composite tubes
CT analysis
Damage mechanism
DIC analysis
Mechanical properties
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Summary:This paper investigates the torsion progressive damage and failure mechanism of two-dimensional (2D) braided carbon/epoxy composite tubes. Four kind of samples with four braiding angles, 30°, 45°, 55°, and 60°, are experimentally tested on the static torsion machine. Three-dimensional digital image correlation (3D-DIC) is utilized to monitor the progressive torsional strain and the crack propagation. Also, Micro-computer tomography (Micro-CT) is employed to describe the volume of damages and the torsional damage morphologies inside the specimens. Results indicate that the braiding angle has a significant effect on the torsional mechanical behaviors. Furthermore, the damage modes of 30° and 60° specimens are mainly influenced by the accumulation of the matrix damage, whereas those of 45° and 50° ones are largely dominated by the fiber tows breakage.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2020.113020