ポリカーボネートの静的破壊における切欠きとき裂の統一的取扱い

概要

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The brittle fracture behavior in the static tension of notched specimens of polycarbonate has been studied for a wide range of notch tip radii. The nominal stress at the brittle fracture decreases with decreasing notch tip radius, and it approaches a constant value when the notch tip radius is less than about 0.1 mm. For notch tip radii less than 0.1 mm, the fracture is well explained on the basis of linear elastic fracture mechanics. For notch tip radii larger than 0.1 mm, the specimens failed in an apparently brittle manner after the formation of a small plastic zone at the notch tip. The experimental results of these specimens have been discussed in terms of a combination of the critical maximum elastic stress and the notch tip radius from the standpoint of linear notch mechanics. It is shown that the maximum elastic stress for brittle fracture is governed by the notch tip radius alone.
一般社団法人日本機械学会の論文
1987-10-25