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Warianty tytułu
Analiza inicjacji pęknięć w stalach konstrukcyjnych z zastosowaniem podejścia mikromechanicznego.
Konferencja
XVIth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies AMT'2001, Gdańsk-Jurata, 16-20 September 2001
Języki publikacji
Abstrakty
Crack initiation in a structural steel, following void nucleation, growth and coalescence, has been analysed. The so-called coupled approach of micromechanical analysis of material damage has been applied. Such an approach is based on experimental testing of both precracked and non-precracked specimens, finite element (FE) calculations and metallurgical analysis. Numerical analyses of ductile-fracture initiation in ferritic steel were carried out through participation in the round robin project organised by European Structural Integrity Society (ESIS) [1]. Smooth round specimens and CT specimens were tested. Critical values of micromechanical damage parameters determined for smooth specimen were used to predict the onset of crack initiation in CT specimen and subsequently to model its stable growth. The analysis of the first phase of ductile fracture, void nucleation, was carried out by applying quantitative metallographic analysis of size and number of non-metallic inclusions. Based on this analysis, initial void volume fraction, used as input information in the large strain (updated Lagrangian) FE calculation, was determined. The results obtained suggest that the critical values of micromechanical parameters according to GTN model may be used for approximate prediction of ductile fracture initiation on CT specimen for tested steel.
Wydawca
Czasopismo
Rocznik
Tom
Strony
741--744
Opis fizyczny
Bibliogr. 14 poz. tab., rys.
Twórcy
autor
- Faculty of Technology and Metallurgy, University of Belgrade, Yugoslavia
autor
- Faculty of Technology and Metallurgy, University of Belgrade, Yugoslavia
autor
- VTI, Belgrade, Yugoslavia
autor
- Faculty of Technology and Metallurgy, University of Belgrade, Yugoslavia
- University of Belgrade, Faculty of Technology and Metallurgy, Yugoslavia
Bibliografia
- [1] Bernauer G., Brocks W.: Numerical round robin on micro-mechanical models – Results, ESIS TC8, Institute for Materials Research – GKSS Research Center, Geesthacht, 2000.
- [2] Gurson A.L.: Continuum Theory of Ductile Rupture by Void Nucleation and Growth; Part I – Yield Criteria and Flow Rules for Porous Ductile Media, Journal of Engineering Materials and Technology 99, (1977), 2-15.
- [3] Tvergaard V.: Influence of Voids on Shear Band Instabilities under Plane Strain Conditions. International Journal of Fracture 17, (1981), 389-407.
- [4] Tvergaard V., Needleman A.: Analysis of Cupe-Cone Fracture in a Round Tensile Bar, Acta Metallurgica 32, (1984), 157-169.
- [5] Zhang Z. L.: A Sensitivity of Material Parameters for the Gurson Constitutive Model, Fatigue & Fracture of Engineering Materials and Structures 19, (1996), 561-570.
- [6] Zhang Z. L. Niemi E.: Studies on the Ductility Predictions by Different Local Failure Criteria, Engineering Fracture Mechanics 48, (1994), 529-540,
- [7] Sun D-Z., Kienzier R,, Voss B, Schmitt W.: Application of Micromechanical Models to the Prediction of Ductile Fracture, Fracture Mechanics – Twenty – Second Symposium, ASTM STP 1131 Vol. II, Atluri S.N., Newman J.C., Raju Jr.I., Epstein J.S. (Eds.), American Society for Testing and Materials, Philadelphia, 1992, 368-378.
- [8] Thomason P.F.: Ductile Fracture of Metals, Pergamon Press, Oxford, 1990.
- [9] Argon A S., Im J.: Separation of Second Phase Particles in Spheroidized 1045 Steel, Metallurgical Transactions 6A, (1975), 839-852.
- [10] Beremin F. M.: Cavity Formation from Inclusions in Ductile Fracture of A508 Steel, Metallurgical Transactions 12A, (1981), 723-731.
- [11] Gurland J.: Observations on the Fracture of Cementite Particles in a Spheroidized 1.05%C Steel Deformed at Room Temperature, Acta Metallurgica 20, (1972), 735-741
- [12] Chu C.C., Needleman A.; Void Nucieation Effects in Biaxially Stretched Sheets, Journal of Engineering and Materials Technology 102, (1980), 249-256.
- [13] Underwood E.E.: Quantitative Stereology, Adison-Welsey, Reading, Mass, 1970.
- [14] Rakin M.. Sedmak A., Matejic P., Zrilic M., Sedmak S.: Numerical Simulation of Ductile Fracture Initiation by application of Rice-Tracey Void Growth Model, Proc. ECF 13 ‘Fracture Mechanics: Applications and Challenges’, M. Fuentes et al. (Eds.), ESIS Publication, Elsevier Science Ltd, Oxford, 2000, printed on CD.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BOS5-0003-0019