Reliability Analysis of Components Life Based on Copula Model
Abstract: It is the general
character of most engineering systems that failure statistical correlation of
elements exists in the fatigue happened process due to the twin loads．Based on
randomized Basquin equation，the constitutive relations are established between
element life and random variable including twin loads，initial strength,fatigue
strength exponent．Product-moment correlation coefficients are derived and used
to quantify the dependence of logarithm life of elements．Aim at fatigue life
correlation of elements in structural systems, the computation model of the
system reliability is preliminarily established by means of using copula
function. The new model can express the dependence of elements fatigue life in
structural systems, can be used probability prediction of structural systems
under common stochastic cyclic load, which gives a new path for
reliability-based design and probability assesment in equipment systems with
multi-mode damage coupling．
Keywords: Fatigue reliability,
Fatigue life correlation, Basquin equation,Copula
Author: Han Wen Qin, Zhou Jin
Yu
Journal Code: jptkomputergg140023
