Assessing surface fatigue crack growth in railway wheelset axle

• Autorzy: Rudavskyi D. V. , Kaniuk Yu. I. , Duriagina Z. A. , Kulyk V. V. , Shefer M. S. , Dolinska I. Ya.

Identyfikatory

DOI

10.5604/01.3001.0014.6973

• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the proposed research is to create a calculation model of surface fatigue crack growth at the axle of railway wheelset working under operational loads. Design/methodology/approach: The energy approach of the fracture mechanics was used to formulate the calculation model of fatigue crack propagation at the wheelset axle surface. The method of least squares was used to determine the investigated material mechanical constants that the kinetic equations of the calculation model contain. The system of differential equations of crack growth kinetics was solved numerically using the Runge-Kutta method. Findings: On the basis of the energy approach of the fracture mechanics the calculation model of fatigue macrocrack growth in three-dimensional elastic-plastic body in case of a mixed-mode I+II+III macromechanism of fracture has been built. On the basis of the created calculation model, the kinetics of the growth of fatigue cracks was investigated both in the middle part of the wheelset axle and in the axle journal. Research limitations/implications: The results obtained on laboratory specimens should be tested during a real railway wheelset axle investigation. Practical implications: The created calculation model can be used in practice to formulate method of residual lifetime estimation of railway wheelset axle. Originality/value: It was shown, that surface crack kinetics depends not only on the crack initial area but also significantly depends on the crack edge geometry and comparatively small crack-like defects at the wheelset axle surface can reach critical sizes in comparatively short run. It has been found that mechanical shear stresses caused by the weight of the loaded railway wagon in the cross section of the wheelset axle journal can significantly accelerate the growth of the transverse fatigue crack at the axle surface, reducing the period of crack subcritical growth by about 20%.

Słowa kluczowe

EN

fatigue crack growth; mixed mode; railway axles; stress intensity factor; estimation model

PL

wzrost pęknięć zmęczeniowych; tryb mieszany; osie kolejowe; współczynnik intensywności naprężeń; model szacowania

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2020
• Tom: Vol. 106, nr 2
• Strony: 59--67
• Opis fizyczny: Bibliogr. 29 poz.

Twórcy

autor

Rudavskyi D. V.

• Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova St., Lviv 79060, Ukraine

autor

Kaniuk Yu. I.

• Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova St., Lviv 79060, Ukraine

autor

Duriagina Z. A.

• Lviv Polytechnic National University, 12 Bandera St., Lviv, 79013, Ukraine
• The John Paul II Catholic University of Lublin, 14 Racławickie Av., 20-950 Lublin, Poland

autor

Kulyk V. V.

• Lviv Polytechnic National University, 12 Bandera St., Lviv, 79013, Ukraine

autor

Shefer M. S.

• Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova St., Lviv 79060, Ukraine

autor

Dolinska I. Ya.

• Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova St., Lviv 79060, Ukraine

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)