Temperature–amplitude spectrum for early full-field vibration-fatigue-crack identification

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Mechanical Sciences Pub Date : 2024-11-16 DOI:10.1016/j.ijmecsci.2024.109829

Martin Česnik, Janko Slavič

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Abstract

A dynamic structure under vibration loading within its natural frequency range can experience failure due to vibration fatigue. Understanding the causes of such failure requires pinpointing the initiation time and location of fatigue cracks, tracking their propagation, and identifying the frequency range of critical stress responses. This research introduces a novel, thermoelasticity-based method – the Temperature–Amplitude Spectrum (TAS) method – for early-stage, full-field, and non-contact crack detection that operates during uninterrupted vibration testing. This method leverages high-speed infrared imaging to analyze the specimen’s temperature–amplitude spectrum, capturing comprehensive crack-related information, including initiation and propagation, in real time. Experimentally validated on both 3D-printed polymer and aluminum specimens, the TAS method accurately identified crack locations and paths without complex adjustments to the experimental setup or data processing. This new approach advances vibration-fatigue testing by enabling reliable, high-resolution crack detection and analysis while remaining computationally efficient.

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用于早期全场振动-疲劳-裂纹识别的温度-幅值谱

动态结构在其固有频率范围内承受振动载荷时，可能会因振动疲劳而失效。要了解这种失效的原因，需要精确定位疲劳裂纹的起始时间和位置，跟踪其扩展情况，并确定临界应力响应的频率范围。这项研究引入了一种基于热弹性的新方法--温度-幅值频谱（TAS）方法，用于在不间断振动测试期间进行早期、全场和非接触式裂纹检测。该方法利用高速红外成像技术分析试样的温度-振幅谱，实时捕捉与裂纹相关的综合信息，包括裂纹的产生和扩展。通过在 3D 打印聚合物和铝试样上进行实验验证，TAS 方法无需对实验装置或数据处理进行复杂调整，即可准确确定裂纹位置和路径。这一新方法实现了可靠、高分辨率的裂纹检测和分析，同时保持了计算效率，从而推动了振动疲劳测试的发展。

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.

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