Analysis of the Deceleration Methods of Fatigue Crack Growth Rates under Mode I Loading Type in Pearlitic Rail Steel

The paper presents a comparison of the results fatigue crack growth rate for raw rail steel, steel reinforced with composite material—CFRP—and also in case counteracting using stop-hole technique, as well an application “anti-crack fluid”. All specimens were tested constant load amplitude methods maximum loading Fmax = 8 kN and stress ratio R σmin/σmax 0.1 order to analyze efficiency different strategies deceleration. It has been shown that grows fastest material slowest fluid” application. Additionally, study on fracture surfaces light scanning electron (SEM) microscopy mechanism was carried out. As result fluid activity, closure occurred significantly decreased driving force finally resulted decrease.