Thermodynamical model of energy dissipation in metals under quasi-static and cyclic loading

• Autorzy: Plekhov O. , Uvarov S. , Naimark O.
• Konferencja: Konferencja mechaniki pękania / sympozjum (X ; 11-14.09.2005 ; Opole-Wisła, Polska)
• Języki publikacji: EN

Abstrakty

EN

Thermodynamic model based on the statistical description of collective properties of mesoscopic defects and analysis of energy balance under plastic flow was proposed. The key point of the approach is the presentation of the nonequilibrium thermodynamic potential (free energy) in term of independent variables: elastic strain and a structural strain induced by defects (microshear ensemble). The constitutive equations were formulated for the plastic strain that allowed the description of the stored energy part and the dissipation related to the plastic flow. Numerical simulation of cyclic (sinusoidal) loading shows the possibility of generation of third and other high harmonics in temperature signal at the last stage fatigue.

Słowa kluczowe

EN

fatigue loading; cyclic loading

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2005
• Tom: z. 82
• Strony: 155--164
• Opis fizyczny: Bibliogr. 4 poz., ilustr., wykr.

Twórcy

autor

Plekhov O.

• Russian Academy of Sciences, Russia

autor

Uvarov S.

• Russian Academy of Sciences, Russia

autor

Naimark O.

• Russian Academy of Sciences, Russia

Bibliografia

• [1] LUONG, M.P.: Infrared thermographics scanning of fatigue in metals, Nuclear Engineering and Design 158, 1995, 363-376.
• [2] FARGIONE G., GERACI A, LA ROSA G., RISITANO A.: Rapid determination of the fatigue curve by the thermographic method, International Journal of Fatigue, 24, 2002, 11-19.
• [3] PLEKHOV O., PALIN-LUC T., NAIMARK O., UVAROV S., SAINTIERN.: Fatigue crack initiation and growth in a 35CrMo4 steel investigated by infrared thermography, Fatigue and fracture of engineering materials and structures 28/1-2, 2005, 169
• [4] NAIMARK O., Defect Induced Transitions as Mechanisms of Piast and Failure in Multifield Continua In "Advances in Multifield Theories of Continua with Substructure", Birkhauser Boston, Inc., 2003, pp.75.