纱线规格对3D机织复合材料拉伸性能的影响

Translated title of the contribution: Effect of yarn size on tensile properties of 3D woven composites

Zengfei Liu, Kai Liu, Binbin Zhang, Xuefeng Li, Jingran Ge, Jian Huang, Chao Li, Xinyang Sun, Yu Sun, Jun Liang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Systematic experiments were carried out to investigate the effect of weft yarn sizes on the mesoscopic structure and mechanical behavior of 3D layer-to-layer twill woven composites. Variations of the mesoscopic yarn structure of the composite with different weft yarn sizes were observed by optical microscopy. Tensile tests were carried out for the composite with different weft yarn sizes. The digital image correlation method was applied to obtain the surface strain field of the tensile specimens. The tensile failure mechanism of the composite was analyzed based on the fracture morphology. It is shown that with the increasing weft yarn size, the crimp ratio of warp yarns increases, the volume fraction of warp fibers decreases, and the warp tensile properties are weakened. However, with increasing weft yarn size, the crimp ratio of weft yarns decreases, the volume fraction of weft fibers increases, and the corresponding weft tensile properties are enhanced. Furthermore, the tensile stress-strain curve of 3D woven composite exhibits a significant "step" effect, which becomes more obvious with higher crimp rates of load-bearing yarns.

Translated title of the contributionEffect of yarn size on tensile properties of 3D woven composites
Original languageChinese (Traditional)
Article number525453
JournalHangkong Xuebao/Acta Aeronautica et Astronautica Sinica
Volume43
Issue number6
DOIs
Publication statusPublished - 15 Jun 2022

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