A novel factor to assess the lateral constraint under mode-I loading

• Autorzy: Fernández-Zúňiga, D. , Castillo, E. , Fernández-Canteli, A.
• Konferencja: Konferencja mechaniki pękania / sympozjum (X ; 11-14.09.2005 ; Opole-Wisła, Polska)
• Języki publikacji: EN

Abstrakty

EN

The stress intensity factors KIxx, KIyy and KIzz are introduced as an extension of the conventional stress intensity factor for mode-I of loading, KI. This enables us the definition of a lateral constraint index, y, as the ratio KIzz / K*Izz at the crack front, or, more generally, as sigmazz(pierwiastek (2(pi)r))/K*Izz outside the crack front, where K*Izz refers to plane strain conditions. The index y is determined numerically by means of three-diemensional finite element calculations. It facilitates the conversion between the stress intensity factor KI and the JI-integral in mode-I of loading for different specimens (CT, SENB, Arcan-Richard, etc.) of whichever thickness, thus opening new perspectives for the consideration of the influence of the lateral constraint by establishing instability conditions of cracks.

Słowa kluczowe

EN

mode-I; novel factor

• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2005
• Tom: z. 82
• Strony: 73-82
• Opis fizyczny: Bibliogr. 8 poz., rys., wykr.

Twórcy

autor

Fernández-Zúňiga, D.

• University Oviedo, Gijón

autor

Castillo, E.

• University Oviedo, Gijón

autor

Fernández-Canteli, A.

• University Cantabria, Santander

• University Oviedo, Gijón

Bibliografia

• [1] FERNANDEZ-ZUŃIGA D., KALTHOFF J.F., FERNANDEZ-CANTELI A., GRASA J., DOBLARE M.: Three-dimensional finite element calculations of crack tip plastic zones and KIc specimen size reąuiremenb ECF 15, Stockholm, 11-13 August, 2004
• [2] HIESE W.: Giiltigkeitskriterien zur Bestimmung von Scherbruchzahig-keiten, Doctoral Thesis, Ruhr-Universitat Bochum, 2000, 139 ps, (in German)
• [3] WILLIAMS M.L.: Stress singularities resulting from various boundary conditions in angular corners of plates in extension, J. of Applied Mechanics 19, Trans, of ASME, 1952, 526-528
• [4] NAKAMURA T., PARKS D.M.: Three-dimensional stress field near the crack front of a thin elastic plate, J. of Applied Mechanics 55, Trans. of ASME, 1988, pp. 805-813
• [5] KWON S.W., SUN C.T.: Characteristics of three-dimensional stress field in plates with a through-the-thickness crack, Int. J. of Fracture 104, 2000. pp. 291-315
• [6] HIBBIT H.D., KARLSSON B.I., SORENSEN E.P.: ABAQUS User Manual, 2002, versión 6.2
• [7] SCIBETTA M.: On the conversion of K- to J-characterization in line elastic 3D configurations, Int. J. of Fracture 117, 2002, L3-L8
• [8] KANNINEN M.F., POPELAR C.H.: Advanced Fracture Mechanics Oxford University Press, 1985