Some Insights into the Fatigue Crack Propagation in Tubes Under Internal Pressure — Proposition of Predicting Models

摘要

This study is a summary of works performed on fatigue crack propagation, that it is by carrying out experimental tests, or numerical simulations, or those using empirical models, relating principally to thick plates in three points bending, in tension and to thick tubes under internal pressure. The objective is to give the broadest possible comparison of various results allowing the follow-up of the shape evolution of semi-elliptic surface defect during its propagation in fatigue. This review work enabled us to conclude that the form variation of a semi-elliptic defect propagating by fatigue in a cylinder under internal pressure, can be obtained by tests on thick plate in tension, or by the use of model proposed by Mahmoud [36, 37] obtained on plate in tension, and model proposed by Boukharouba et al. [31] obtained and validated by the experimental results on tube under internal pressure.