The impact of temperature oscillations and heat transfer conditions in thick-walled elbows and tubes on the local stress-strain behaviour during the fast start-up of power boilers

• Autorzy: Okrajni Jerzy , Wacławiak Krzysztof

Identyfikatory

DOI

10.24423/EngTrans.896.20191210

• Języki publikacji: EN

Abstrakty

EN

The paper presents results of tests designed for predicting the behaviour of components subjected to variable temperature and mechanical loading conditions. Elbows and tubes, as examples of components widely used in power plant pipelines, have been examined. This analysis includes a description of model characteristics, the operating parameters of devices under industrial conditions, and the results of computational modelling (FEM).

Słowa kluczowe

EN

stress-strain behavior; thermo-mechanical fatigue; thick-walled elements; numerical simulation; heat transfer

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2019
• Tom: Vol. 67, iss. 4
• Strony: 579--591
• Opis fizyczny: Bibliogr. 14 poz., rys., wykr.

Twórcy

autor

Okrajni Jerzy

• Silesian University of Technology Faculty of Materials Engineering Department of Advanced Materials and Technologies Krasińskiego 8, 40-019 Katowice, Poland

autor

Wacławiak Krzysztof

• Silesian University of Technology Faculty of Materials Engineering Department of Advanced Materials and Technologies Krasińskiego 8, 40-019 Katowice, Poland

Bibliografia

• 1. Farragher T.P., Scully S.O., O’Dowd N.P., Leen S.B., Development of life assessment procedures for power plant headers operated under flexible loading scenarios, International Journal of Fatigue, 49: 50–61, 2013, doi: 10.1016/j.ijfatigue.2012.12.007.
• 2. Okrajni J., Twardawa M., Local strains that lead to the thermo-mechanical fatigue of thick-walled pressure vessels, Materials Performance and Characterization, 3(2): 245–261, 2014, doi: 10.1520/MPC20130059.
• 3. Farragher T.P., Scully S., O’Dowd N.P., Leen S.B., Thermomechanical analysis of pressurized pipe under plant conditions, ASME Journal of Pressure Vessels Technology, 135(1): 011204, 2012, doi: 10.1115/1.4007287.
• 4. Okrajni J., Twardawa M., Boundary conditions in models of power plant components under thermal loading, Archives of Materials Science and Engineering, 62(1): 28–35, 2013.
• 5. Okrajni J., Twardawa M., Influence of a variable in time heat transfer coefficient on stresses in models of power plant components, ASME Journal of Pressure Vessel Technology, 136(4): 041602, 2014, doi: 10.1115/1.4026799.
• 6. ANSYS Elements Reference, Release 11.0, USA, SAS IP, Inc., 2007.
• 7. ANSYS Structural Analysis Guide, Release 12.1, USA, SAS IP, Inc., 2009.
• 8. Halama R., Sedlák J., Šofer M., Phenomenological modelling of cyclic plasticity, Numerical Modelling, Dr. Peep Miidla [Ed.], ISBN: 978-953-51-0219-9, InTech, 2012, doi: 10.5772/35902.
• 9. PN-EN 12952-4:2002: Water-tube boilers and ancillary equipment – Part 4: Calculations of the expected durability of boilers during operation [in Polish: Kotły wodnorurowe i urządzenia pomocnicze – Część 4: Obliczenia oczekiwanej trwałości kotłów podczas eksploatacji].
• 10. Bressers J., Remy L. [Eds], Fatigue under thermal and mechanical loading, Netherlands: Kluwer Academic Publishers, 1996.
• 11. Hähner P., Rinaldi C., Bicego V., Affeld E., Brendel T., Andersson H., Beck T., Klingelhöffer H., Kühn H-J., Köster A., Laveday M., Marchionni M., Rae C., Research and development into a European code-of-practice for strain-controlled thermomechanical fatigue test, International Journal of Fatigue, 30(2): 372–381, 2008, doi: 10.1016/j.ijfatigue.2007.01.052.
• 12. Sehitoglu H., Thermal and Thermo-mechanical Fatigue of Structural Alloys, [in:] Fatigue and Fracture. ASTM Handbook, Vol. 19, pp. 527–556, 2008, doi: 10.31399/ asm.hb.v19.9781627081931.
• 13. Okrajni J., Plaza M., Simulation of the fracture process of materials subjected to lowcycle fatigue of mechanical and thermal character, Journal of Material Processing Technology, 53(1–2): 311–318, 1995, doi: 10.1016/0924-0136(95)01988-Q.
• 14. Okrajni J., Junak G., Marek A., Modelling of the deformation process under thermomechanical fatigue conditions, International Journal of Fatigue, 30(2): 324–329, 2008, doi: 10.1016/j.ijfatigue.2007.01.043.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).