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技术文章

08 Numerical Investigation of T-joints with 3D Four Directional Braided Composite Fillers Under Tensile Loading.

  • 分类:文章分类
  • 作者:Xiao-kang Li, Zhen-guo Liu1, Long Hu, et al.
  • 来源:Applied Composite Materials. 24 (1): 171-191, 2017.
  • 发布时间:2021-02-27 17:42
  • 访问量:

【概要描述】

08 Numerical Investigation of T-joints with 3D Four Directional Braided Composite Fillers Under Tensile Loading.

【概要描述】

  • 分类:文章分类
  • 作者:Xiao-kang Li, Zhen-guo Liu1, Long Hu, et al.
  • 来源:Applied Composite Materials. 24 (1): 171-191, 2017.
  • 发布时间:2021-02-27 17:42
  • 访问量:
详情

Numerical studied on T-joints with three-dimensional four directional (3D4D) braided composite fillers was presented in this article. Compared with conventional unidirectional prepreg fillers, the 3D braided composite fillers have excellent ability to prevent crack from penetrating trigone fillers, which constantly occurred in the conventional fillers. Meanwhile, the 3D braided composite fillers had higher fiber volume fraction and eliminated the fiber folding problem in unidirectional prepreg fillers. The braiding technology and mechanical performance of 3D4D braided fillers were studied. The numerical model of carbon fiber T-joints with 3D4D braided composite fillers was built by finite element analysis software. The damage formation, extension and failing process of T-joints with 3D4D braided fillers under tensile load were investigated. Further investigation was extended to the effect of 3D4D braided fillers with different braiding angles on mechanical behavior of the T-joints. The study results revealed that the filling area was the weakest part of the T-joints where the damage first appeared and the crack then rapidly spread to the glue film around the filling area and the interface between over-laminate and soleplate. The 3D4D braided fillers were undamaged and the braiding angle change induced a little effect on the bearing capacity of T-joints.

本文介绍了三维四向(3D4d)编织复合材料填料T型接头的数值研究。与常规单向预浸料填料相比,这种3D编织复合填料具有出色的防止裂纹穿透到三角区填料内的能力,而这种现象在传统填料中经常发生。同时,该3D编织复合填料具有更高的纤维体积分数,并且消除了单向预浸料填料中的纤维折叠问题。研究了3D4d编织填料的编织技术和力学性能。利用有限元分析软件建立了含3D4d编织复合材料填料的碳纤维T型接头的数值模型。研究了3D4d编织填料T形接头在拉伸载荷下的损伤形成,扩展和破坏过程。进一步的研究扩展到具有不同编织角度的3D4d编织填料对T型接头力学性能的影响。研究结果表明,填充区域是T形接头最薄弱的部分,首先出现损伤,然后裂缝迅速扩散到填充区域周围的胶膜和覆膜与底板之间的界面。 3D4d编织填料没有损坏,编织角度的变化对T型接头的承载力几乎没有影响。(本文研究结果显示,三维编织填料制备的T型接头的无损伤承载能力较传统的T型接头有较大幅度的提升)

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