破壊じん性値がき裂速度依存性を有する完全ぜい性材料の破壊強度のき裂長さ依存性
微小き裂についての数値シミュレーション
1995 年 44 巻 499 号 p. 451-456
詳細
1995 年 44 巻 499 号 p. 451-456
The effect of crack-length on the fracture strength σ0 of rate-sensitive, perfectly brittle materials was studied by numerical simulations in 3 point bending (3PB) and single edge cracked tensile (SECT) specimens with a small crack. Simulations including rate effect show that c-value in σ0∝x0-c relation (x0; non-dimensional initial crack length) is smaller than the value (c=0.5) which is reduced from linear fracture mechanics without any rate effect.
The difference in σ0 between 3PB and SECT specimens and the size effect on σ0 are also studied. All of the simulated results show quantitatively good coincidence with the extensive experimental works reported previously on brittle materials such as glasses and ceramics.
