에너지 기반 마모모델을 적용한 압입축 프레팅 마모해석

초록

Railway axles are among critical components ensuring safe and efficient train operations. They are particularlysusceptible to damage mechanisms such as fretting wear and fatigue. Fretting induced by high contact pressure andmicroslip between contact surface can significantly deteriorate fatigue strength at the contact edge of the press-fitsection. Recent research has been conducted to enhance axle strength and reliability. However, fretting wear or microcrackformation at the wheel-press-fit zone of axles is still an active area of investigation. Accurately analyzing frettingwear is challenging due to its sensitivity to numerous factors such as changes in friction coefficient, influence of wearparticles, and selection of an appropriate wear model. This paper aimed to establish a comprehensive analysis methodfor fretting wear in interference-fitted axles using finite element analysis (FEA) and numerical analysis techniques. Twowear models were applied in simulations: an Archard wear model and an energy-based wear model. Analysis resultswere compared with experimental data from rotating bending fatigue press-fit specimens. This comparison will helpvalidate the proposed analysis method and assess the effectiveness and accuracy of different wear models in predictingfretting wear in press-fit axles.

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