計算機実験によるセラミックスの強度分布と寸法効果 : 続報:強度に下限値が存在する場合

概要

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Following the previous report, the strength distribution of ceramics was simulated by the Monte-Carlo metbod for the case in Which the lower limit existed in the strength of ceramics. In this study, the tensile strength, 3-Point and 4-Point bending strengths of specimens of four different sizes were calculated, by using the model specimens with anumber of penny-Shaped inner cracks. In order to investigate the change of strength distribution of ceramics due to the size effect, the strength obtained was plotted on the Weibull probability paper. It was found that the shape of strength distribution was convex for the specimens of largeef fective volume, While it was concave forthose of small effective volume. The strength distribution function forthis model was also expressed and compared with the simulation results. Asaresult, both distri butions showed good agreement in the range of fracture probability greater than a fewpercents. Furtber more, there lation between the meanstrength and the effective volume was discussed. As the strength of the specimens variedbetweerl the lower and upper limits, its relation was represented by a inverse S-shap courve on the logarithmic graph paper.
社団法人日本材料学会の論文
1991-04-15