On-line detection of fretting fatigue crack initiation by lock-in thermography

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• 作者：Saosometh Chhith^a ; ^b ; ^{saosometh.chhith@ugent.be} ; Wim De Waele^a ; ^b ; Patrick De Baets^a ; ^b ; Tanja Van Hecke^c
• 关键词：Fretting fatigue ; Crack initiation ; Lock-in thermography ; On-line monitoring
• 刊名：Tribology International
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：108
• 期：Complete
• 页码：150-155
• 全文大小：1630 K
• 卷排序：108

文摘

The temperature data can be grabbed and processed on-line with a Matlab script without storage issues. The standard lock-in or Fast Fourier transform algorithms allow to reduce the signal-to-noise ratio from 25 mK to 2 mK. The thermo-elastic temperature amplitude can be used as an indicator for on-line crack initiation. The methodology is expected to work for any fatigue tests if the crack location can be estimated in advance.