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Note on modelling of fatigue damage rates for non‐Gaussian stresses
Author(s) -
Rychlik I.
Publication year - 2013
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12042
Subject(s) - kurtosis , laplace transform , moment (physics) , gaussian , structural engineering , vibration fatigue , function (biology) , laplace's method , amplitude , mathematics , engineering , statistics , fatigue testing , mathematical analysis , physics , classical mechanics , quantum mechanics , evolutionary biology , biology
ABSTRACT 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.