Local approach and FEM in brittle fracture prediction

• Autorzy: Kozák V. , Dlouhý I.
• Konferencja: Conference on Numerical Method in Continuum Mechanics (6 ; 16-18.09.1996 ; Stará Lesná, Słowacja)
• Języki publikacji: EN

Abstrakty

EN

Local approach in fracture mechanics is based on the application of appropriate failure micromechanistic models to make predictions of fracture behaviour. The FEA of crack-tip and an associated post-processing routine is usually applied. Here should be noted the distinction between the cells of material, having characteristic microstructural dimensions, which constitute the cleavage process zone, and the corresponding finite elements used to represent their behaviour. Predictions of brittle fracture are based on the Beremin local approach model, where the Weibull location parameter Q u and shape parameter m have been calculated using FEM for Charpy type specimen. These parameters are considered to be transferable materal properties, independent of temperature, specimen geometry or loading mode and can be used for prediction of the stress intensity factor K.

Słowa kluczowe

EN

finite element method

PL

metoda elementów skończonych

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Computer Assisted Mechanics and Engineering Sciences
• Rocznik: 1998
• Tom: Vol. 5, nr 2
• Strony: 193--198
• Opis fizyczny: Bibliogr. 8 poz., tab., wykr.

Twórcy

autor

Kozák V.

• Institute of Physics of Materials, Academy of Sciences of the Czech Republic, 616 62 Brno, Žižkova 22

autor

Dlouhý I.

• Institute of Physics of Materials, Academy of Sciences of the Czech Republic, 616 62 Brno, Žižkova 22

Bibliografia

• [1] M. Holzmann et al. The local approach application (in Czech). Conf. Engineering Mechanics, 51-56, Svratka, 1996.
• [2] V. Kozák, et al. Evaluation of critical fracture using FEM. Numer. Methods in Continuum Mech., 330-336, Stara Lesná, Slovakia, 1994.
• [3] F.M. Beremin. A Local Criterion for Cleavage Pressure Vessel Steel. Metal. Trans. A, Vol. 14A: 2277-2287, 1983.
• [4] A.H. Sherry, et al. The application of local approach to assess the influence of in-plane constraint on cleavage fracture. Meeting of ESIS TC1, Elastic Plastic Fracture Mech., P1, 1995.
• [5] D.P.G. Lidbury, et al. Application of local approach to predict cleavage and ductile fracture. TAGSI Symp. Advances in Fracture Mech., 1996.
• [6] C. Sainte-Catherine. Draft procedure to measure and calculate local fracture criteria on notched tensile specimens. Meeting of ESIS TC1, Elastic Plastic Fracture Mech., App. 1, 1995.
• [7] L. Xia, C.F. Shih. Ductile crack growth-III. trans. to cleavage fracture incorporating statistic. J. Mech. Solids, 44(4): 603-639, 1996.
• [8] I. Dlouhy, V. Kozák, et al. The susceptibility of Weibull stress on steel microstructure. MECAMAT 96, Brittle Fracture Oral Section, 22-32, Fontainebleau, 1996.