The effect of strength differential on material effort and lifetime of steam turbine rotors under thermo-mechanical load

• Autorzy: Banaszkiewicz Mariusz , Dudda Waldemar , Badur Janusz

Identyfikatory

DOI

10.24423/EngTrans.964.20190426

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of experimental tests and numerical simulations related with the strength differential effect. Tensile and compression tests on 2CrMoV low-alloy steel are performed to evaluate the magnitude of the yield stress difference in tension and compression. The strength differential parameter is then used in the formula for equivalent stress proposed by Burzyński. The material effort calculated using Burzyński and Huber-Mises-Hencky hypotheses was compared for different start-stop cycles. Analytical notch stress-strain correction rules by Neuber and Glinka-Molski were applied to compute elastic-plastic strain amplitudes in rotor circumferential grooves. It was finally shown that the strength differential effect has significant influence on the predicted fatigue life under thermo-mechanical loading.

Słowa kluczowe

EN

strength differential; equivalent stress; steam turbine; rotor lifetime

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2019
• Tom: Vol. 67, iss. 2
• Strony: 167--184
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wykr.

Twórcy

autor

Banaszkiewicz Mariusz

• The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences Energy Conversion Department Fiszera 14, 80-231 Gdańsk, Poland

autor

Dudda Waldemar

• University of Warmia and Mazury, Faculty of Technical Sciences Oczapowskiego 11, 10-719 Olsztyn, Poland

autor

Badur Janusz

• The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences Energy Conversion Department Fiszera 14, 80-231 Gdańsk, Poland

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 (2020).