RESEARCH PAPER
Outline of a method for estimating the durability of components or device assemblies while maintaining the required reliability level
1
Air Force Institute of Technology ul. Księcia Bolesława 6, 01-494 Warsaw 96, Poland
2
Faculty of Mechatronics and Aerospace Military University of Technology ul. Kaliskiego 2, 00-908 Warsaw 49, Poland
Publication date: 2018-06-30
Eksploatacja i Niezawodność – Maintenance and Reliability 2018;20(2):260-266
KEYWORDS
ABSTRACT
The paper includes a probabilistic method for evaluating the durability of components and device assemblies which
operate under the impact of destructive processes. As a result of these processes, wear that causes deterioration of their
cooperation conditions occurs. It is assumed that a component operates reliably when the wear does not exceed the acceptable (limit) values. In mathematical terms, this method is based on a differential equation, after the transformation
of which, it is possible to obtain the Fokker-Planck type partial differential equation. The specific solution of this equation allows for obtaining the density function of the probability wear in the normal distribution form. The paper presents
two methods for determining the durability. The first one involves the application of the wear density function, and the
second one consists in determining the probability density function of the time of reaching the acceptable state, and its
use in order to determine the component or assembly durability. The paper presents a numerical example on the aircraft
technology operation process
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| ISSN: | 1507-2711 |
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