Study on Interlaminar Tensile Properties of Large Thickness Stitched Composites

YANG Hongyu; WU Ning; HAN Meiyue; ZHU Chao; CHEN Li

doi:10.16080/j.issn1671-833x.2021.11.069

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Study on Interlaminar Tensile Properties of Large Thickness Stitched Composites

更新时间：2025-10-30

- Study on Interlaminar Tensile Properties of Large Thickness Stitched Composites
- Aeronautical Manufacturing Technology Vol. 64, Issue 11, Pages: 69-75(2021)
- 作者机构：
  
  1. 天津工业大学,天津,300387
  2. 天津工业大学先进纺织复合材料教育部重点实验室,天津,300387
  3. 南京玻璃纤维研究设计院有限公司,南京,210012
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2021.11.069
  CLC：
- Published：2021
- 稿件说明：
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杨宏宇，吴宁，韩美月，朱超，陈利. 大厚度缝合复合材料的层间拉伸性能[J]. 航空制造技术, 2021, 64(11): 69-75/85.

YANG Hongyu, WU Ning, HAN Meiyue, ZHU Chao， CHEN Li. Study on Interlaminar Tensile Properties of Large Thickness Stitched Composites. 航空制造技术, 2021, 64(11): 69-75/85.
杨宏宇，吴宁，韩美月，朱超，陈利. 大厚度缝合复合材料的层间拉伸性能[J]. 航空制造技术, 2021, 64(11): 69-75/85. DOI： 10.16080/j.issn1671-833x.2021.11.069.

YANG Hongyu, WU Ning, HAN Meiyue, ZHU Chao， CHEN Li. Study on Interlaminar Tensile Properties of Large Thickness Stitched Composites. 航空制造技术, 2021, 64(11): 69-75/85. DOI： 10.16080/j.issn1671-833x.2021.11.069.

摘要

为了探究缝合工艺参数对大厚度缝合复合材料层间性能的影响，采用改进的锁式缝合技术结合真空辅助树脂灌注成型工艺（VARI）制备了缝合复合材料试样。使用万能材料试验机测试了缝合间距和预制分层位置对其层间拉伸性能的影响。采用扫描电子显微镜（SEM）表征了试样失效后的断面形貌。结果表明，缝合间距为 5mm×5mm，预制分层位置在 17.5mm 厚度处时，试样的层间拉伸性能最佳。缝合复合材料的层间断裂模式主要表现为缝合线从基体抽出后断裂、缝合线在基体内直接断裂和缝合线层间直接断裂。

Abstract

In order to investigate the influence of the stitching process parameters on the interlaminar properties of large-thickness stitched composites

this paper prepared stitched composite specimens using a modified locking stitching technique combined with a vacuum-assisted resin infusion (VARI) molding process. The effects of the stitching spacing and prefabricated delamination position on the interlaminar tensile properties were tested using a universal material testing machine. The specimens were characterized by scanning electron microscopy (SEM) to determine the cross-sectional morphology after failure. The results showed that the interlaminar tensile properties of the specimens were best when the stitching spacing was 5mm×5mm and the prefabricated delamination position was at the depth of 17.5mm. The interlaminar fracture mode of the stitched composites was mainly presented as: fracture of the stitches after extraction from the matrix

direct fracture of the stitches within the matrix

and direct fracture of the stitches between the layers.

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