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技术文章

12 Investigation on the Yarn Squeezing Effect of Three Dimensional Full Five Directional Braided Composites.

  • 分类:文章分类
  • 作者:Long Hu, Guoquan Tao, Zhenguo Liu
  • 来源:Applied Composite Materials. 26:371–387, 2019
  • 发布时间:2021-02-26 14:26
  • 访问量:

【概要描述】

12 Investigation on the Yarn Squeezing Effect of Three Dimensional Full Five Directional Braided Composites.

【概要描述】

  • 分类:文章分类
  • 作者:Long Hu, Guoquan Tao, Zhenguo Liu
  • 来源:Applied Composite Materials. 26:371–387, 2019
  • 发布时间:2021-02-26 14:26
  • 访问量:
详情

The influence of yarn squeezing effect on the geometric morphology and mechanical property of the three dimensional full five directional (3DF5D) braided composites is explored. Spatial path and cross-section shape of the yarns in the braided structure are characterized based on the micro computed tomography (micro CT) scanning images. The yarn distortion due to the squeezing effect is discussed and mathematical morphology of the yarn geometry is established. A new repeated unit cell (RUC) model of 3DF5D braided composites considering yarn squeezing effect is developed. Based on this model, mechanical properties of 3DF5D braided composites are analyzed. Good agreement is obtained between the predicted and experiment results. Moreover, the stress distribution of the new RUC model are compared with original RUC model, showing that the squeezing effect significantly increases the stress concentration level of the axial yarns.

探索了纱线挤压效果对三维全五向(3DF5D)编织复合材料的几何形态和力学性能的影响。 编织结构中纱线的空间路径和横截面形状基于微观计算机断层扫描(micro CT)扫描图像进行表征。 讨论了由于挤压效应引起的纱线变形,并建立了纱线几何形状的数学形态。 开发了一种考虑纱线挤压效应的新型3DF5D编织复合材料的代表性胞体单元(RUC)模型。 在此模型的基础上,对3DF5D编织复合材料的力学性能进行了分析。 预测结果与实验结果之间取得了很好的一致性。 此外,将新RUC模型的应力分布与原始RUC模型进行了比较,表明挤压效应显着提高了轴向纱线的应力集中水平。

 

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