Numerical investigation of creep behaviour of high-temperature steam turbine compone

• Autorzy: Banaszkiewicz M.
• Języki publikacji: EN

Abstrakty

EN

The paper presents a model for creep basing on the so-called characteristic creep strain. It illustrates its application in computations of old steam turbines components. The presented model is a modification of the Norton model which relates the stress exponent to the creep rupture strength and current stress. Creep strain is a function of the above two quantities, i.e., rupture strength and current stress, and acharacteristic creep strain which is material constant for a given time and temperature. Computational examples regard the rotating and pressure components analysed using the finite element method.

Słowa kluczowe

EN

creep; lifetime assessment; steam turbine

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN
• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 2012
• Tom: nr 124
• Strony: 5--15
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Banaszkiewicz M.

• ALSTOM Power Ltd., Sto zniowa 2, 82-300 Elbl¡g, Poland

Bibliografia

• [1] Visvanathan R.: Damage Mechanisms and Life Assessment of High-Temperature Components. ASM Int., Metals Park, Ohio 1989.
• [2] Webster G.A., Ainsworth R.A.: High Temperature Component Life Assessment. Chapman & Hall, London 1994.
• [3] Bolton J.: A `Characteristic-strain' model for creep. In: Pro. ECCC/IMechE Conf. on Creep and Fracture in High Temperature Components (J.A. Shibli, S.R. Holdsworth, G. Merkling, Eds.), London, Sept. 2005, 465_477.
• [4] Norton F.H.: The Creep of Steel at High Temperatures. M Graw-Hill, London 1929.
• [5] Chmielniak T., Kosman G., Rusin A.: Creep of Thermal Turbines Components. WNT, Warsaw 1990.
• [6] Bolton J.: Analysis of structures based on a characteristic-strain model of creep. In: Pro. ECCC/IMechE Conf. on Creep and Fracture in High Temperature Components ( J.A. Shibli, S.R. Holdsworth, G. Merkling, Eds.),London, Sept. 2005, 1032_1045.
• [7] ABAQUS User's Manual, Ver. 6.6, 2006.
• [8] Zienkiewicz O.C., Taylor R.L., Zhu, J.Z.: The Finite Element Method: Its Basis and Fundamentals. Elsevier, 2006.
• [9] Bartsch H.: A new creep equation for ferritic and martensitic steels. Steel Res. 66(1995), 9, 384_388.
• [10] Binda L., Holdsworth S.R., Mazza E.: The exhaustion of creep ductility in 1CrMoV steel. Int. J. Pres. Ves. Pip. 87(2010), 6, 319_325.