Fully coupled thermo-mechanical-wear analysis for brake interface of high-speed train

IF 5.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Wear Pub Date : 2024-07-23 DOI:10.1016/j.wear.2024.205510
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引用次数: 0

Abstract

The tribology behavior of the brake interface is a vital aspect since it determines the service life and operation safety of the train. To be more understanding about this, a fully coupled thermo-mechanical-wear finite element algorithm is proposed to study the evolution of temperature, wear and mechanical contact at the interface of high-speed train brake systems, and the correctness of which is experimentally validated. In this approach, contact stress is extracted to calculate the interfacial heat flux for the subsequent thermomechanical coupling analysis. Meanwhile, based on the Achard wear model, the interfacial wear degradation under thermal conditions is simulated through ABAQUS subroutine UMESHMOTION with the help of arbitrary Lagrangian–Eulerian (ALE) remeshing technique. Using the proposed method, the dynamic interaction between temperature, wear and contact stress is investigated, and the coupling mechanism between these factors is revealed. The results indicate that the temperature magnitude will be overestimated without considering the wear effect. In reverse, the thermal expansion has a significant influence on the wear and contact behavior. The interfacial contact behavior is jointly influenced by surface wear and thermal effects. Therefore, it is impossible to accurately predict the tribology behavior of the brake interface without a comprehensive consideration of these factors.

高速列车制动接口的热机械磨损全耦合分析
制动界面的摩擦学行为是一个至关重要的方面,因为它决定了列车的使用寿命和运行安全。为了更好地理解这一点,我们提出了一种完全耦合的热机械磨损有限元算法,用于研究高速列车制动系统界面上温度、磨损和机械接触的演变,并通过实验验证了该算法的正确性。在这种方法中,通过提取接触应力来计算界面热通量,以便进行后续的热机械耦合分析。同时,基于 Achard 磨损模型,通过 ABAQUS 子程序 UMESHMOTION,在任意拉格朗日-欧勒(ALE)重映射技术的帮助下,模拟了热条件下的界面磨损降解。利用所提出的方法,研究了温度、磨损和接触应力之间的动态相互作用,并揭示了这些因素之间的耦合机制。结果表明,如果不考虑磨损效应,温度幅度会被高估。反之,热膨胀对磨损和接触行为有显著影响。界面接触行为受到表面磨损和热效应的共同影响。因此,如果不全面考虑这些因素,就不可能准确预测制动器界面的摩擦学行为。
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来源期刊
Wear
Wear 工程技术-材料科学:综合
CiteScore
8.80
自引率
8.00%
发文量
280
审稿时长
47 days
期刊介绍: Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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