Modelowanie procesu zmęczenia cieplno-mechanicznego

• Autorzy: Okrajni J.
• Konferencja: Conference on Fracture Mechanics (XIII ; 5-7.09.2011 ; Opole ; Polska)
• Języki publikacji: PL

Abstrakty

EN

The main purpose of the work is the method of the description of the thermo-mechanical fatigue process of power plant components working under mechanical and thermal loading. The work focuses on the chosen component strain- stress characteristics. The FEM modelling has been used to describe the local stress- strain behaviour of the chosen power plant element. The calculations of stress distribution on the component surface show that the internal pressure induces considerably smaller values of stresses and strains in comparison with the same stresses specified for thermal loads. Thus, thermal impacts are responsible for cracks initiation and growth in areas of the greatest intensity of damage accumulation. The presented analysis is the part of the complex investigation method which main purpose is increasing the accuracy of the TMF process description and thermo-mechanical life assessment. In such situation the industrial investigations curried out in the work give the model approach and data for the comparison the real behaviour with the predictions.

Słowa kluczowe

PL

zmęczenie cieplno-mechaniczne; pole naprężeń; blok energetyczny

EN

thermo-mechanical fatigue; power plant

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2011
• Tom: z. 99
• Strony: 123--125
• Opis fizyczny: Bibliogr. 3 poz., rys.

Twórcy

autor

Okrajni J.

• Politechnika Śląska, Katedra Technologii Materiałów,

Bibliografia

• [1] ORŁOŚ Z.: pod red., Naprężenia cieplne, Wydawnictwo Naukowe, PWN, Warszawa, 1991
• [2] OKRAJNI J., MAREK A., JUNAK G.: Thermo-mechanical fatigue: code of practice and development of mechanical models. Internet Jour- nal, OMMI (Operation Maintenance and Materials Issue), 2008, Vol. 5., Issue 1, May
• [3] HÄHNER P. et al.: Research and development into a European code-of- practice for strain-controlled thermo-mechanical fatigue testing, Interna- tional Journal of Fatigue, v. 30, issue 2, January 2008