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Note on modelling of fatigue damage rates for non-Gaussian stresses.

Igor Rychlik (Institutionen för matematiska vetenskaper, matematisk statistik)
Fatigue & Fracture of Engineering Materials & Structures (8756-758X). Vol. 36 (2013), 8, p. 750-759.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: cultivator loads, Laplace moving averages, rainflow cycles, time-scaled loads



Denna post skapades 2013-06-13. Senast ändrad 2015-03-02.
CPL Pubid: 178359

 

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Institutioner (Chalmers)

Institutionen för matematiska vetenskaper, matematisk statistik (2005-2016)

Ämnesområden

Sannolikhetsteori och statistik
Tillförlitlighets- och kvalitetsteknik

Chalmers infrastruktur