Energy released for branching and kinking cracks

• Autorzy: Boguszewski T. , Molski K.
• Konferencja: Konferencja mechaniki pękania / sympozjum (X ; 11-14.09.2005 ; Opole-Wisła, Polska)
• Języki publikacji: EN

Abstrakty

EN

Energy released due to the appearance of a very small branch at the tip of a main crack is calculated. Method for determining the G(alfa) factor is based on integrating the product of the known stress components released along the plane of the small branch and corresponding displacements obtained using numerical FEM approach. This procedure makes it possible to calculate both GI( alfa) and GII(alfa ) energy components. Results are compared with a different approach obtained directly by considering local values of the stress intensity factors KI(alfa) and KII(alfa), valid for the branch tip. Some additional effects of a sharp notch appearing just behind the branch crack are also described.

Słowa kluczowe

EN

energy components; branch crack

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2005
• Tom: z. 82
• Strony: 37--44
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Boguszewski T.

• Politechnika Białostocka, Polska

autor

Molski K.

• Politechnika Białostocka, Polska

Bibliografia

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• [3] IRWIN G.R. (1957), Analysis of stress and strains near the end of crack traversing a plate, Trans. ASME, J. Appl. Mech., 24, 361-365.
• [4] ISHIDA M., NISHINO T., (1982), Formulae of Stress Intensity Factor of Bent Cracks in Piane Problems, Trans. Japan Soc. Mech. Engr., Vol. 48-430, 729 -738.
• [5] PALANISWAMY K., KNAUSS E.G. (1972), Propagation of a crack under generał in-plane tension, Int. J. Fract. Mech., 8, 114-117.
• [6] SEWERYN A. (2004), Modelowanie zagadnień kumulacja uszkodzeń i pękania w złożonych stanach obciążeń, Białystok 2004.
• [7] SNEDDON LR (1946), The distribution of stress in the neighborhood of crack in a elastic solid, Proc. Roy Soc. London, A 187, 229-260.
• [8] TADA H., PARIS P., IRWIN G.R. (1973), The stress analysis of crack handbook, Boston, Academic Press.
• [9] WANG C.H., (1978), Fracture criteria for combined mode cracks, Sci. Sin., 21,457-474.