Popis: |
The aim of this paper is to investigate the failure rate behaviour of a component subjected to a random diffuse stress environment, that is a stress whose intensity is an extremely variable continuous random function. This intensity is taken as the square of an Ornstein-Uhlenbeck random process path. Moreover, a concept of memory of the component with respect to the stress is introduced, which allows to consider different kinds of stress action (instantaneous, cumulative and others). Explicit and implicit formulas are derived for the resulting failure rate of the component from which it is shown that the stress contribution part rapidly converges to some finite constant value at least in the case of an instantaneous effect of the stress. |