Progressive failure simulation of notched tensile specimen for triaxially-braided composites

Journal Article (2019)
Author(s)

Zhenqiang Zhao (Northwestern Polytechnical University)

Haoyuan Dang (Northwestern Polytechnical University)

Jun Xing (Northwestern Polytechnical University, Civil Aviation Administration of China)

Xi Li (Northwestern Polytechnical University, TU Delft - Structural Integrity & Composites)

Chao Zhang (Northwestern Polytechnical University)

Wieslaw K. Binienda (The University of Akron)

Yulong Li (Northwestern Polytechnical University)

Research Group
Structural Integrity & Composites
Copyright
© 2019 Zhenqiang Zhao, Haoyuan Dang, Jun Xing, X. Li, Chao Zhang, Wieslaw K. Binienda, Yulong Li
DOI related publication
https://doi.org/10.3390/MA12050833
More Info
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Publication Year
2019
Language
English
Copyright
© 2019 Zhenqiang Zhao, Haoyuan Dang, Jun Xing, X. Li, Chao Zhang, Wieslaw K. Binienda, Yulong Li
Research Group
Structural Integrity & Composites
Issue number
5
Volume number
12
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Abstract

The mechanical characterization of textile composites is a challenging task, due to their nonuniform deformation and complicated failure phenomena. This article introduces a three-dimensional mesoscale finite element model to investigate the progressive damage behavior of a notched single-layer triaxially-braided composite subjected to axial tension. The damage initiation and propagation in fiber bundles are simulated using three-dimensional failure criteria and damage evolution law. A traction-separation law has been applied to predict the interfacial damage of fiber bundles. The proposed model is correlated and validated by the experimentally measured full field strain distributions and effective strength of the notched specimen. The progressive damage behavior of the fiber bundles is studied by examining the damage and stress contours at different loading stages. Parametric numerical studies are conducted to explore the role of modeling parameters and geometric characteristics on the internal damage behavior and global measured properties of the notched specimen. Moreover, the correlations of damage behavior, global stress-strain response, and the efficiency of the notched specimen are discussed in detail. The results of this paper deliver a throughout understanding of the damage behavior of braided composites and can help the specimen design of textile composites.