A numerical and experimental investigation was conducted to determine the effect of interference‐fit size on damage behaviour of bolted single‐lap carbon fibre‐reinforced plastic/Ti alloy composite structure. Three‐dimensional finite element analysis (FEA) was conducted for interference‐fit bolt installation process considering the friction coefficient and nonlinear shear stress–strain relationship, and damage sub‐routine was used to predict composite progressive failure region and failure type in single‐lap bolted‐joints. Experiments involving three interference‐fit sizes of 0.4%, 2.1% and 3.0% were designed to verify the FEA. In addition, micro‐analysis results show that damage type during interference‐fit bolt inserting process predicted by FEA was consistent with experimental results. Various types of micro‐scale damage around the hole after interference bolt installation were analysed and characterised, and the effects of interference‐fit size on structure strength were analysed in view of micro‐scale damage. An appropriate interference‐fit size can prompt the carbon fibre‐reinforced plastic hole to become ‘brush‐like’ and exhibit ‘soften’ and ‘buffering’ effect that improves the bearing capacity. In this paper, interference fit of 2.1% exhibits the maximum bearing damage strength.
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Li et al. (2015) studied this question.
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