A Study on Characteristic of Probabilistic Distribution of Fatigue Fracture Toughness in SM20C steel

SM20C 강의 피로파괴인성치의 확률분포 특성에 관한 연구

The strength of material is scattered owing to the inhomogenity of microstructure, in spite of the same material. Therefore, in order to design the mechanical structure with the reliability engineering, it is important to grasp the statistic nature of material strength. In this paper, effects of grain sizes for the statistical nature of the fatigue crack growth was discussed. And the statistical of mechanical properties was compared with statistical nature of the fatigue crack growth rate.