• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2023, Vol. 59 ›› Issue (22): 287-301.doi: 10.3901/JME.2023.22.287

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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

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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