Simulation demonstrates bolt loosening dynamics under cyclical loads, suggesting better designs for fastening systems.
When a screw fastening part is vibrated from side to side, the bearing surface and the thread surface go from a fixed state to a sliding state, and the screw loosens by rising due to the helical shape of the screw. This phenomenon is a loosening phenomenon caused by cyclical load over a long period of time, and in order to represent the loosening that occurs due to the accumulation of extremely small looseness, a numerical analysis method that accurately reproduces the friction phenomenon is required. This paper introduces a bolt loosening simulation using the Hashiguchi friction model.
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Motoharu Tateishi (2025) studied this question.
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