Journal of Mechanical Science and Technology

, Volume 32, Issue 2, pp 753–760 | Cite as

Deviation based fault detection method for shackles under variable loading

  • Sunghyun Lee
  • Insu Jeon
  • Dong-Cheon Baek


Shackles used in lifting work are mainly subjected to fatigue loading during operation. The failure of the shackles can lead to catastrophic accidents and economic loss because they serve as a connection between loads and lifting equipment. Thus, it is necessary to detect the faults of shackles in advance. In this study, weak points of a shackle were identified through the calculated stress distribution and were verified through fatigue tests. The representative features were extracted based on RMS and peak-to-peak values of dual strain data. Thresholds for fault detection were defined using the features and the weight functions considering the inverse proportion between strain values and lifetime of shackles. The performance of detectors was evaluated by comparing with cycles between the detected fault and the incipient crack. The selected detector without using complex formulas can carry out the fault detection of shackles effectively.


Dual strain data Fault detection Fatigue test Finite element analysis Health monitoring Sensor network Shackles 


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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Mechanical EngineeringChonnam National UniversityGwangjuKorea
  2. 2.Reliability Assessment CenterKorea Institute of Machinery and MaterialsDaejeonKorea

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