Propagation of a fatigue crack through a protektive layer.

book chapter

English

The contribution describes a study of the behaviour of a fatigue crack growing in a protective layer and penetrating through the interface and into the substrate. The study aims especially to quantify the influence of the interface on the rate and treshold value of a fatigue crack propagating perpendiculary to the interface. Special atention is devoted to the case of a crak touching the interface. It is shown that the fatigue crack propagation rate and the corresponding treshold value are strongly influenced by the existence of an interface between two materials. A tentative procedure suggested in the paper makes it possible to quantify the effect and determine the dependence of a rate of propagation of a fatigue crack growing through the interface and the bi-material parameters alfa and beta. The results generaly contribute to a better understanding of the failure of structures with protective layers.

Fatigue, crack propagation, protective layer

NÁHLÍK, L., KNÉSL, Z., VRBKA, J.

2001

1. 1. 2001

Edited by C.A. Brebia, WIT Press 2001, Southampton, Boston

Great Britain, Southampton, Boston

1-85312-872-4

Surface Treatment V. Computer methods and experimental measurements.

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