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IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2025-03-12 DOI:10.1016/j.engfailanal.2025.109525

Jiacheng Shen , Yu Pan , Jianyong Zuo

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引用次数: 0

摘要

轮毂制动盘是高速列车制动系统的关键部件，而螺栓孔在实践中被认为是疲劳失效的高风险区域。本研究提出了一种结合多轴应力状态的热疲劳损伤分析方法，以探索轮毂制动盘的复杂失效机理。建立并验证了典型轮毂制动盘的有限元模型，以获得更接近现实的预测结果。分析了紧急制动时制动盘的热力学响应，并根据多轴应力状态预测了关键节点的疲劳寿命。结果表明，螺栓孔区域的多轴应力共同促成了疲劳损伤的形成，而不是由特定的单轴应力造成的。此外，还通过模拟分析进一步研究了疲劳裂纹扩展的演变过程。研究结果表明，与径向相比，轴向扩展更容易导致疲劳破坏。这项研究旨在深入探讨轮毂制动盘的热疲劳损伤机理，为关键制动部件的结构设计和有效维护策略的制定提供指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Study on thermal fatigue damage mechanisms for high-speed train’s wheel-mounted brake disc considering multiaxial stress state

The wheel-mounted brake disc is a critical component of the high-speed train brake system, and the bolt hole is identified as a high-risk region for fatigue failure in practice. This study proposes a thermal fatigue damage analysis method incorporating the multiaxial stress state to explore the complex failure mechanisms for wheel-mounted brake discs. A finite element model of a typical wheel-mounted brake disc is established and validated for a closer-to-reality prognostication. The thermodynamic response of the brake disc during emergency braking is analyzed, and the fatigue life of the critical nodes is predicted based on the multiaxial stress state. The results reveal that the multiaxial stress in the bolt-hole region jointly contributes to the formation of fatigue damage, as opposed to being caused by a specific uniaxial one. Additionally, the evolution of fatigue crack propagation is further investigated by simulation analysis. The findings indicate that the propagation in axial is more likely to result in fatigue failure, compared to the radial direction. This study is supposed to provide insights into the mechanisms of thermal fatigue damage in wheel-mounted brake discs and offer guidance for the structural design of critical brake components as well as the development of effective maintenance strategies.

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来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.