547 規則形および非規則形多結晶体モデルに生ずる弾性場の構造(OS7-7 微視的挙動・効果II)(OS7 微視構造を有する材料の力学)  [in Japanese] 547 Structure of elastic stress filed in polycrystals of regular and irregular shaped grains  [in Japanese]

Two dimensional polycrystal models which include about 2400 crystal grains of regular or irregular shape are developed and their elastic deformation under uniaxial tensile load are analyzed by finite element method. The results show that elastic stress distribution form long range structures with stripe pattern. Fourier analysis of the distribution of the normal stress in the loading direction shows that the wave length in the direction parallel to the loading direction rages as large as the lateral dimension of the whole specimen, while the wave length in the direction perpendicular to the loading direction has its spectrum peak near the average grain diameter. Effect of the irregularity in the shape of crystal grains on the stress distribution is prominent in the spectrum power at wave length shorter than the average grain diameter.