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

Česnik, Martin (author), Slavič, Janko (author)

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.

• Language: English
• Keywords: vibration fatigue, crack initiation, crack propagation, thermoelasticity theory, high-speed IR imaging, temperature-amplitude spectrum, early full-field crack identification
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: 11 str.
• Numbering: Vol. 286, [art. no.] 109829
• PID: 20.500.12556/RUL-165158
• UDC: 536
• ISSN on article: 0020-7403
• DOI: 10.1016/j.ijmecsci.2024.109829
• COBISS.SI-ID: 215377923
• Publication date in RUL: 25.11.2024

Record is a part of a journal

• Title: International journal of mechanical sciences
• Shortened title: Int. j. mech. sci.
• Publisher: Pergamon
• ISSN: 0020-7403
• COBISS.SI-ID: 25648384

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: utrujenost zaradi vibracij, nastanek razpok, širjenje razpok, teorija termoelastičnosti, infrardeče slikanje, spekter temperature in amplitude, zgodnja identifikacija razpok

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0263
• Name: Mehanika v tehniki