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An improved shell-fastener model for modelling C/SiC composite bolted joints with rough surface characteristics

机译：一种改进的壳体紧固件模型，用于用粗糙表面特性建模C / SIC复合螺栓接头

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摘要

An improved shell-fastener model is proposed to study the mechanical behavior of C/SiC composite bolted joints with the rough surface (millimetric magnitude). Based on the axial compressive experiment, the normal contact stiffness is obtained by a modified fractal normal contact model, which is also validated by using a solid FE model and a hybrid FE model (shell-fastener and solid nuts). The equivalent axial stiffness and shear stiffness used in the shell-fastener model for the bolted joints are determined combining with normal contact stiffness. In comparison of the experimental results, the improve shell-fastener model with equivalent stiffness under pre-tightening load can efficiently and accurately describe the in-plane tension of C/SiC composite bolted joints. The proposed model has the potential to study the large C/SiC composite structures with a large number of bolted joints.
机译：提出了一种改进的壳体紧固件模型，以研究C / SiC复合螺栓接头与粗糙表面（毫幅）的力学行为。基于轴向压缩实验，通过改进的分形正常接触模型获得正常接触刚度，该模型也通过使用固体FE模型和混合用FE模型（壳 - 紧固件和固体）来验证。用于螺栓接头的壳体紧固件模型中使用的等效轴向刚度和剪切刚度，与正常接触刚度相结合。在实验结果的比较中，通过预紧负荷下具有等效刚度的改进外壳 - 紧固件模型可以有效地和精确地描述C / SiC复合螺栓接头的平面内张力。所提出的模型有可能研究大量螺栓接头的大C / SIC复合结构。

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  • 来源
    《Composite Structures》 |2020年第11期|112516.1-112516.10|共10页
  • 作者

    Fu Maoqing; Fang Guodong; Wu Zengwen; Zhou Zhengong; Liang Jun;

  • 作者单位

    Harbin Inst Technol Sci & Technol Adv Composites Special Environm Key Harbin 150001 Peoples R China;

    Harbin Inst Technol Sci & Technol Adv Composites Special Environm Key Harbin 150001 Peoples R China;

    Harbin Inst Technol Sci & Technol Adv Composites Special Environm Key Harbin 150001 Peoples R China;

    Harbin Inst Technol Sci & Technol Adv Composites Special Environm Key Harbin 150001 Peoples R China;

    Beijing Inst Technol Inst Adv Struct Technol Beijing 100081 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    C/SiC composite; Bolted joints; Fractal contact; Shell-fastener model;

    机译：C / SIC复合材料;螺栓连接;分形触点;壳体搭建模型;

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