• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2023, Vol. 59 ›› Issue (22): 287-301.doi: 10.3901/JME.2023.22.287

• 材料科学与工程 • 上一篇    下一篇

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基于多尺度及ECPL模型的平纹机织复合材料胶-螺混合连接承载性能分析

杨亚旭, 时建纬, 李成, 陈栋   

  1. 郑州大学机械与动力工程学院 郑州 450001
  • 收稿日期:2022-11-03 修回日期:2023-03-05 出版日期:2023-11-20 发布日期:2024-02-19
  • 通讯作者: 李成(通信作者),男,1962年出生,博士,教授,博士研究生导师。主要研究方向为复合材料损伤分析和复合材料损伤检测。E-mail:chengli@zzu.edu.cn
  • 作者简介:杨亚旭,男,1996年出生。主要研究方向为复合材料力学及损伤分析。E-mail:yangyaxu2020@gs.zzu.edu.cn
  • 基金资助:
    国家自然科学基金民航联合基金资助项目(U1833116)。

Multi-scale and ECPL Model Based Loading Capacity Analysis of Hybrid Bond-bolted Joint for Plain Woven Composite

YANG Yaxu, SHI Jianwei, LI Cheng, CHEN Dong   

  1. School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001
  • Received:2022-11-03 Revised:2023-03-05 Online:2023-11-20 Published:2024-02-19

摘要: 采用多尺度的方法对平纹机织复合材料胶-螺混合连接接头在拉伸载荷下的承载性能进行数值模拟和试验研究。首先从纤维束的微细观尺度出发,根据纤维丝六角形堆积方式和铺层中纤维束的卷曲结构,建立纤维束微观代表性体积单元(Representative volume element,RVE)模型和平纹机织复合材料铺层的细观RVE模型,并基于连续损伤力学模型和三维Hashin失效准则对RVE模型进行有限元仿真分析。然后根据局部均匀化方法,引入一种能够反映铺层间0°和90°纤维束交叉方式的等效交叉层合板(Equivalent cross-ply laminates,ECPL)模型,将细观RVE的性能参数等效为ECPL模型中0°和90°子胞的性能参数。最后,将ECPL模型进行扩展,建立不同搭接参数的平纹机织复合材料胶-螺混合连接宏观尺度有限元模型并进行仿真分析,得到接头的位移-载荷曲线和损伤过程。研究表明,增大搭接长度和宽度均可明显提高接头的峰值载荷和平均刚度;在单螺栓到四螺栓的变化范围内,混合接头的峰值载荷随螺栓数量的增多而增大,平均刚度随之减小;单螺栓搭接接头的承载性能随螺栓直径的增大呈现出先增大后减小的趋势,在这个过程中接头的破坏形式由复合材料板的面内剪切破坏向挤压破坏转变。

关键词: 平纹机织复合材料, 多尺度, 胶-螺混合连接, 承载性能

Abstract: A multi-scale approach is used to numerically simulate and experimentally investigate the load-carrying performance of the hybrid bonded-bolted joints of plain woven composite under tensile loading. Firstly, the micro-scale RVE model of the fiber bundle and the meso-scale RVE model of the cross-ply of plain woven composite are created based on the hexagonal stacking of fiber filaments and the curl structure of fiber bundles in the ply. The finite element analysis of the RVE model is performed based on the continuum damage mechanics model and the 3D Hashin failure criterion. Then an equivalent cross-ply laminates(ECPL) model, representing the 0° and 90° fiber bundles crossing pattern between plies is proposed based on the local homogenization method. The properties of the mesoscale RVE are equated to those of the 0° and 90° subcells in the ECPL model. Finally, the ECPL model is extended to build a macro-scale finite element model of the hybrid bonded-bolted joint for plain woven composite with different lap parameters and simulated to obtain the displacement-load curves and damage process of the joints. The study shows that increasing the lap length and width can significantly improve the peak load and average rigidity of the joints; in the range of single bolt to four bolts, the peak load increases with the increase of the number of bolts but the average rigidity decreases; the load-carrying performance of the single bolt lap joint shows a trend of increasing and then decreasing with the increase of the bolt diameter, and the damage form of the joints changes from in-plane shear damage to extrusion damage in this process.

Key words: plain woven composites, multi-scale, hybrid bonded-bolted joint, load-carrying performance

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