Premium
A RANDOMIZED ENDURANCE LIMIT IN FATIGUE DAMAGE ACCUMULATION MODELS
Author(s) -
Kopnov V. A.
Publication year - 1993
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/j.1460-2695.1993.tb00077.x
Subject(s) - fatigue limit , limit (mathematics) , vibration fatigue , component (thermodynamics) , structural engineering , residual , stochastic process , simple (philosophy) , mathematics , fatigue testing , computer science , engineering , statistics , mathematical analysis , algorithm , physics , thermodynamics , philosophy , epistemology
The use of random parameters for describing S‐N curves requires special caution. A Peculiar Fatigue Curves (PFC) method based on a linear damage accumulation rule is proposed for modelling the fatigue damage accumulation process. The fatigue properties of a component are presented in the PFC form by randomizing its endurance limit which facilitates a simple technique to predict fatigue life and residual life distributions. Possible usages of the models and their restrictions are illustrated for some common load histories of a component. Particular attention is paid to the stochastic relations between random variables having in some cases improper distributions. The problem of experimental testing of the models is also discussed.