Determination of fatigue crack propagation limit curves for high strength steels,and their applicability for structural elements having crack like defects

摘要

There are different documents and standards containing fatigue crack propagation limit or design curves and rules for the prediction of crack growth.The research work aimed to characterise the fatigue crack propagation resistance of different steels using limit curves,based on statistical analysis of test results and fatigue crack propagation law,and to determine fatigue crack propagation limit curves for different structural steels and wide-spreading high strength steels,and their welded joints,under mode I and mixed mode I + II loading conditions.