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

概要

論文の詳細を見る
The effect of crack-length on the fracture strength σ_0 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 σ_0 ∝ x_0^<-c> relation(x_0;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 σ_0 between 3PB and SECT specimens and the size effect on σ_0 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.
社団法人日本材料学会の論文
1995-04-15