K-0625 予き裂材の低サイクル疲労試験におけるき裂伝ぱ挙動(G03-7 疲労・き裂)(G03 材料力学部門一般講演)

概要

論文の詳細を見る
The growth behavior of crack was investigated under cyclic torsion with and without axial static stress using precracked steel. After shear mode crack growth, branching of the crack was observed on both sides of the crack. The length between the first branching points was dependent on loading conditions. This length was longer when the applied shear amplitude and the static axial stress level were higher. The crack propagation behavior had good correlation with the branching behavior. It is found that the crack opening and the initiation of micro cracks help the shear mode crack growth After the branching of crack, loading method was changed from cyclic torsion to push-pull. When applied normal stress was higher, the crack grew under the condition of maximum shear stress criterion. On the other hand, when applied stress was lower, the crack grew under the condition of maximum principal stress criterion. Those behaviors are also related to slip band density and crack opening.
一般社団法人日本機械学会の論文
2001-08-22