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[en] As a rule the continuum mechanics assumes homogeneity and isotropicity of the involved material. These assumptions are satisfactory for engineering load capability analysis and the engineering lifetime analysis of the parts that are significantly larger than the order of the material inhomogeneities and are only moderately deformed. However, the inhomogeneity of the material becomes more and more important when analyzing the initiation and propagation of cracks or load capability of the material in the vicinity of the limit strength. The inhomogeneity and anisotropicity of the material can be modeled by dividing the continuum into limited number of randomly shaped grains with variable material properties. However, this procedure is numerically quite demanding. The solution to this problem is envisioned by the development of methods that transfer the significant data on the inhomogeneity into the classical macroscopic models. The interesting method is the usage of the correlation length. The correlation length can be used to estimate the domain of influence of the individual inhomogeneities in the simulated aggregate of randomly oriented and shaped crystal grains. This article deals with several issues related to the calculation of correlation length from a 2D stress field.(author)
Source
Jencic, I.; Tkavc, M. (Nuclear Society of Slovenia (Slovenia)) (eds.); Nuclear Society of Slovenia, Ljubljana (Slovenia). Funding organisation: Inst. Jozef Stefan, Ljubljana (Slovenia); European Nuclear Society, Brussels (Belgium); Ministry of Education, Science and Sport of Slovenia, Ljubljana (Slovenia); Slovenian Nuclear Safety Administration, Ljubljana (Slovenia); Agency for Radwaste Management, Ljubljana (Slovenia); Faculty of Mechanical Engineering, Univ. of Ljubljana (Slovenia); Graduate Program Nucelar Engineering, Univ. of Ljubljana (Slovenia); Inst. of Metals and Technology, Ljubljana (Slovenia); Inst. of Metal Constructions, Ljubljana (Slovenia); NPP Krsko (Slovenia); Framatome, Paris (France); Westinghouse Electric Systems Europe S.A., Brussels (Belgium); Canberra-Packard Central Europe, Schwadorf (Austria); Elmont, Krsko (Slovenia); ENCONET International, Zagreb (Croatia); Inetec, Zagreb (Croatia); NUMIP, Krsko (Slovenia); Q Techna, Krsko (Slovenia); SIAP, Maribor (Slovenia); [602 p.]; ISBN 961-6207-20-2; 
; 2002; [8 p.]; International Conference Nuclear Energy in Central Europe 2002; Kranjska Gora (Slovenia); 9-12 Sep 2002; Also available from Slovenian Nuclear Safety Administration, Zelezna cesta 16, Ljubljana (SI) or Nuclear Society of Slovenia, Jamova 39, Ljubljana (SI); 8 refs., 6 figs.
; 2002; [8 p.]; International Conference Nuclear Energy in Central Europe 2002; Kranjska Gora (Slovenia); 9-12 Sep 2002; Also available from Slovenian Nuclear Safety Administration, Zelezna cesta 16, Ljubljana (SI) or Nuclear Society of Slovenia, Jamova 39, Ljubljana (SI); 8 refs., 6 figs.