Abstract
We propose a computational model of fatigue crack growth in structural elements with inhomogeneous mechanical characteristics. The model is based on the energy criterion of fatigue fracture of materials and a hypothesis that the crack propagates in the direction of the maximum possible rate. The fatigue-crack growth rate is represented as a function of the parameters of loading and strength characteristics of the material. The proposed model is used for the determination of the residual fatigue life of welded structures with faulty fusions. The results of numerical evaluation of residual fatigue life are in good agreement with the experimental data.
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