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Portrait of Krzysztof Podgórski. Photo.

Krzysztof Podgórski

Professor, Head of the Department of Statistics

Portrait of Krzysztof Podgórski. Photo.

The Laplace multi-axial response model for fatigue analysis

Author

  • Johan Karlsson
  • Krzysztof Podgórski
  • Igor Rychlik

Summary, in English

This paper introduces means for fatigue damage rates estimation using Laplace distributed multiaxial loads. The model is suitable for description of stresses containing transients of random amplitudes and locations. Explicit formulas for computing the expected value of rainflow damage index as a function of excess kurtosis are given for correlated loads. A Laplace model is used to describe variability of forces and bending moments measured at some location on a cultivator frame. An example of actual cultivator data is used to illustrate the model and demonstrate the accuracy of damage index prediction.

Department/s

  • Department of Statistics

Publishing year

2016-04-01

Language

English

Pages

11-17

Publication/Series

International Journal of Fatigue

Volume

85

Document type

Journal article

Publisher

Elsevier

Topic

  • Probability Theory and Statistics

Keywords

  • Laplace moving averages
  • Multi-axial loads
  • Rainflow method
  • Random loading
  • Spectral density function

Status

Published

ISBN/ISSN/Other

  • ISSN: 0142-1123