Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (1): 97-100.DOI: 10.12068/j.issn.1005-3026.2014.01.023

• Mechanical Engineering • Previous Articles     Next Articles

TimeDependent Reliability Analysis of Underground Vehicle’s Parts Based on Multicrack Propagation

SHI Boqiang, TANG Geteng   

  1. School of Mechanical Engineering, Beijing University of Science and Technology, Beijing 100083, China.
  • Received:2013-03-27 Revised:2013-03-27 Online:2014-01-15 Published:2013-07-09
  • Contact: SHI Boqiang
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Abstract: Considering the existence of multicrack damage in underground vehicle’s parts, the torsion fatigue test for simulating the fatigue damage was built. The surface crack after certain fatigue cycles was further measured by telephoto microscope and camera, and the Paris model and residual strength estimation model were used to process the data for residual intensity. Then, the timedependent reliability mathematical model was used to calculate the drift rate and fluctuation rate of timevariant intensity, and finally educed the reliability. This method solves the problem of dynamic detection of parts’ time varying intensity when using timedependent theory, and advances the timedependent theory to the engineering application. It has a good application prospect.

Key words: underground vehicle, multicrack, timedependent, uncertainty, reliability

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