This paper aims to investigate the tangential sliding behavior of bolted joints with high bolt preload. Experiments with 12.4 kN preload show that wearing effect is not obvious during the micro-slip stage while pronounced during the macro-slip stage. A phenomenon of decreasing macro-slip force is observed. A novel constitutive model for wearing effect is proposed and verified against experiments. A discretization strategy of evenly-divided stiffness for the model is provided and applied in FEM simulation. Numerical results show that element numbers have no obvious effect on the calculating accuracy of the backbone curve during micro-slip stage. For macro-slip stage, more elements provide higher accuracy. Compared with previous constitutive models, the proposed one can accurately describe the decreasing macro-slip force under different conditions.

本文旨在研究具有高螺栓预紧力的螺栓连接的切向滑动行为。12.4 kN预紧力的实验表明，在微滑移阶段，磨损效果不明显，而在大滑移阶段则明显。观察到宏观滑移力减小的现象。提出了一种新型的磨损效果本构模型，并通过实验进行了验证。提供了该模型的均匀划分刚度的离散化策略，并将其应用在有限元模拟中。数值结果表明，单元数目对滑移阶段主干曲线的计算精度没有明显的影响。对于宏滑台，更多的元件可提供更高的精度。与以前的本构模型相比，提出的模型可以准确地描述在不同条件下减小的宏观滑移力。