M&M材料力学カンファレンス
Online ISSN : 2424-2845
セッションID: OS0704
会議情報
OS0704 多軸応力条件におけるSUS304鋼の高温疲労き裂進展特性(OS7-1 高温・寿命,OS-7 多軸応力下における疲労損傷および疲労き裂進展1)
磯貝 毅高橋 悠樹黒澤 太希森本 勇
著者情報
会議録・要旨集 フリー

詳細
抄録
Fatigue crack growth tests under multiaxial stress conditions were conducted at elevated temperature. Cyclic tension and torsion were applied to the thin-walled cylindrical specimens of SUS 304 stainless steel. By using DC electrical potential drop (PD) method, fatigue crack growth rate was quantified. Under multiaxial stress conditions, two types of fatigue crack growth were observed; "tensile type" crack, which propagates along the direction, φ, perpendicular to the maximum principal stress, σ_1 and "shear type" crack, which propagates along the direction of maximum shear stress, τ_<max>. Using the crack length projected to the φ-direction and the direction of τ_<max>, fatigue crack growth rates were evaluated by the corresponding stress intensity ranges, ΔK_<Ib> and ΔK_<Iic>, respectively. The characteristics of both type of fatigue crack were discussed.
著者関連情報
© 2011 一般社団法人 日本機械学会
前の記事 次の記事
feedback
Top