The key problems of local approach to cleavage fracture

• Autorzy: Kotrechko S.

Warianty tytułu

PL

Kluczowe zagadnienia w lokalnym ujęciu kruchego pękania

• Języki publikacji: EN

Abstrakty

EN

Based on the suggested multi-scale model of Local Approach (LA) to fracture, four main problems of LA are considered, namely: (i) the effect of micro-stress fluctuations on the crack nuclei instability; (ii) intensity of micro-crack nucleation and its influence on fracture probability; (iii) theoretical and experimental assessment of the value of threshold stress; (iv) stochastic analysis of “multi-barrier” effect at micro-crack growth in polycrystalline metal.

PL

W oparciu o zaproponowany wieloskalowy model lokalnego sformułowania procesu pękania (Local Approach – LA) wyróżniono cztery podstawowe problemy do rozważenia: (i) efekt fluktuacji makronaprężeń na niestabilność jądra pęknięcia, (ii) intensywność zawiązywania się mikropęknięcia i jego wpływ na prawdopodobieństwo powstania przełomu, (iii) teoretyczne i eksperymentalne oszacowanie wartości naprężenia krytycznego, (iv) stochastyczna analiza efektu „wieloprogowego” na wzrost mikropęknięcia w metalu polikrystalicznym.

Słowa kluczowe

EN

local approach to fracture; multi-scale model; local fracture stress

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2013
• Tom: Vol. 51 nr 1
• Strony: 75--89
• Opis fizyczny: Bibliogr. 18 poz., rys.

Twórcy

autor

Kotrechko S.

• Institute for Metal Physics, NAS of the Ukraine, Kyiv, Ukraine

Bibliografia

• 1. Beremin F., 1983, A local criterion for cleavage fracture of a nuclear pressure vessel steel, Metallurgical Transactions, A 14, 2277-2287
• 2. Bordet S.R., Karstensen A.D., Knowles D.M., Wiesner C.S., 2005, A new statistical local criterion for cleavage fracture in steel. Part I: Model presentation, Engineering Fracture Mechanics, 72, 435-452
• 3. Indenbom V., 1961, Criteria of fracture in dislocation theories of strength, Physica Status Solidi, 3, 7, 2071-2079 [in Russian]
• 4. Kotrechko S., 1995, Statistic model of brittle fracture of polycrystalline metals, Physic Metals, 14, 1099-1120
• 5. Kotrechko S., 2002, Physical Fundamentals of Local Approach to analysis of cleavage fracture, [In:] Transferability of Fracture Mechanical Characteristic, I. Dlouhy (Edit.), NATO Science Series, Series II, 78, 135-150
• 6. Kotrechko S., 2003, A local approach to brittle fracture analysis and it physical interpretation, Strength of Materials, 35, 4, 334-345
• 7. Kotrechko S., Meshkov Yu., 2001, Physical fundamentals of a local approach to analysis of brittle fracture of metals and alloys, Materials Science, 37, 4, 583-597
• 8. Kotrechko S., Meshkov Yu., Dlouhy I., 2001, Computer simulation of effect of grain size distribution on Weibull parameters, Theoretical and Applied Fracture Mechanics, 35, 255-260
• 9. Kotrechko S., Meshkov Yu., Mettus G., 1995, Physical nature of strength of polycrystalline metal near the embrittlement point, Metal Physics and Advanced Technologies, 14, 1205-1210
• 10. Kotrechko S., Strnadel B., Dlouhy I., 2007, Fracture toughness of cast ferritic steel applying local approach, Theoretical and Applied Fracture Mechanics, 47, 171-181
• 11. Kotrechko S., et al., 2011, Local scale effect at cleavage fracture of metals, Metal Physics and Advanced Technologies, 33, 687-705
• 12. Lambert-Perlade A., Gourgues A.F., Besson J., Sturel T., Pineau A., 2004,Mechanisms and modeling of cleavage fracture in simulated heat-affected zone microstructures of a high-strength low alloy steel, Metallurgical and Materials Transactions, A35, 1039-1053
• 13. Lin T., Evans A.G., Ritchie R.0., 1986, Statistical analysis of cleavage fracture ahead of Sharp cracks and rounded, Acta Metallurgica, 34, II, 2205-2216
• 14. Lindley T.C., Oates G., Richards C.E., 1970, A critical appraisal of carbide cracking mechanisms in ferride/carbide aggregates, Acta Metallurgica, 18, 1127-1136
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• 16. Martin-Meizoso A., Ocana-Arizcorreta I., Gil-Sevillano J. and Fuentes-Perez M., 1994, Modelling cleavage fracture of bainitic steels, Acta Metallurgica et Materialia, 42, 2057-2068
• 17. Pineau A., 2006, Development of the local approach to fracture over the past 25 years: theory and applications, International Journal of Fracture, 138, 139-166
• 18. Pineau A, Benoot T., 2010, Advances in cleavage fracture modelling in steels: Micromechanical, numerical and multiscale aspects, Comptes Rendus Physique, 11, 316-325