Laboratory for Dynamics of Machines and Structures 
Short-time Fatigue-Life Estimation for Non-Stationary Processes Considering Structural Dynamics
 A. Zorman, J. Slavič and M. Boltežar
International Journal of Fatigue, 2021

download pdf   https://doi.org/10.1016/j.ijfatigue.2021.106178

More research on: vibration fatigue.
Abstract
Structural dynamics relates the excitation profile to the dynamic loads at a particular location of the structure. Spectral methods fatigue-life estimation is based on the assumptions of stationarity and the Gaussianity. This research proposes a method for a fatigue-life estimation for non-stationary excitation. The method is based on the short-time spectral narrowband method, where the short-time width was found to be related to the structural dynamics (i.e., natural frequency, damping) of the excited structure. A detailed numerical and a real experiment shows a significant accuracy increase for fatigue-life estimation at non-stationary and non-Gaussian excitation.
Authors

Researcher

Aleš Zorman, PhD Student

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  ales.zorman@fs.uni-lj.si
  +386 1 4771 230

Professor

Janko Slavič, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  janko.slavic@fs.uni-lj.si
  +386 1 4771 226
jankoslavic     jankoslavic    
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Professor

Miha Boltežar, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  miha.boltezar@fs.uni-lj.si
  +386 1 4771 608
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