Estimation of strength properties of functionally graded structures with elliptical stress concentrators

• Autorzy: Stotsko Z.A. , Kuzin B. , Kuzin M.O. , Mechanik V.A.

Identyfikatory

DOI

10.5604/01.3001.0015.6973

• Języki publikacji: EN

Abstrakty

EN

Purpose: The purpose of this paper is to elaborate new calculation schemes for evaluating the strength parameters of railway rolling stock parts with non-local properties of surface layers in the presence of elliptical stress concentrators. Design/methodology/approach: Using the proposed approaches of developed mathematical modelling and open software for calculating FEniCS, it were established the most dangerous angles of stress concentrator orientation and the required thickness of the hardened zones of parts, which ensures their minimum softening during operation. Findings: It is shown that for an elliptical stress concentrator with any orientation angle, there is a certain key size of surface hardening thickness, the exceeding the value of which does not have influence on the operational strength of the parts, but rise the price of technological operations. Research limitations/implications: In this paper proposes a method for computation the impact of the orientation of the surface elliptical stress concentrators on the contact strength of parts under conditions of dominate friction power loads. Practical implications: The obtained results were used to set the modes of plasma hardening, which increase the contact strength of railway parts with elliptical stress concentrators. Originality/value: Using the approaches of contact mechanics, mathematical and computer modelling, methods of controlling the contact strength of the parts with the surface elliptical stress concentrators were proposed for the first time.

Słowa kluczowe

EN

elliptical stress concentrators; optimization of hardening modes; power load; computational mechanics

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2022
• Tom: Vol. 113, nr 1
• Strony: 35--41
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Stotsko Z.A.

• Lviv Polytechnic National University, 12 Bandera street, Lviv, 79013, Ukraine

• https://orcid.org/0000-0003-0423-8561

autor

Kuzin B.

• Lviv Branch of Dnipro National University of Railway Transport named after academician V. Lazaryan, 12a I. Blazhkevich street, Lviv, 79052, Ukraine

autor

Kuzin M.O.

• Lviv Branch of Dnipro National University of Railway Transport named after academician V. Lazaryan, 12a I. Blazhkevich street, Lviv, 79052, Ukraine

autor

Mechanik V.A.

• V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, 2, Avtozavodskaya Str., Kiev, 04074, Ukraine

Bibliografia

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• [6] Y. Murakami, Theory of elasticity and stress concentration, John Wiley & Sons, 2017. DOI: https://doi.org/10.1002/9781119274063
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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).