Note on modelling of fatigue damage rates for non-Gaussian stresses.
Journal article, 2013

This note reviews the means for fatigue damage rates estimation using scaled Laplace distributed loads. The model is suitable for the description of stresses containing transients of random amplitudes and locations. Moment method to estimate model parameters is given. Explicit formulas to compute rainflow damage rate as a function of excess kurtosis are presented. Laplace model is used to describe the variability of forces measured at some location on a cultivator frame. Validation of the model and uncertainty analysis in fatigue damage predictions is given.

Laplace moving averages

time-scaled loads

rainflow cycles

cultivator loads


Igor Rychlik

Chalmers, Mathematical Sciences, Mathematical Statistics

University of Gothenburg

Fatigue and Fracture of Engineering Materials and Structures

8756-758X (ISSN) 1460-2695 (eISSN)

Vol. 36 8 750-759


Basic sciences

Subject Categories

Reliability and Maintenance

Probability Theory and Statistics



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