Abstract
For accurate determination of the service life we must take into account the loading, which
are in most cases random loading of variable amplitude, the geometry and material properties of
construction elements which are known not to be constants. The more precise these input parameters
are modeled; the more precise and reliable are the results.
In our paper we will deal in detail with the model of crack initiation and propagation in the
complex structures as a basis of the algorithm for calculating the service life. For determination of
the service life for the area of short cracks we used Bilby, Cottrell and Swinden model which is
based on the theory of continuously distributed dislocations and we complemented it with random
generation of structure of material before cracks. For the long crack we have developed a stochastic
model for determination of service life.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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