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A constitutive model of cyclic viscoplasticity considering changes in subsequent viscoplastic deformation due to the evolution of dislocation structures

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タイトル: A constitutive model of cyclic viscoplasticity considering changes in subsequent viscoplastic deformation due to the evolution of dislocation structures
著者: Mayama, T. 著作を一覧する
Sasaki, K. 著作を一覧する
Ishikawa, H. 著作を一覧する
キーワード: Constitutive model
Creep
Stress-relaxation
Cyclic loading
Viscoplastic material
Mechanical testing
Dislocation structures
発行日: 2007年 5月
出版者: Elsevier
誌名: International Journal of Plasticity
巻: 23
号: 5
開始ページ: 915
終了ページ: 930
出版社 DOI: 10.1016/j.ijplas.2006.10.003
抄録: This paper presents a unified constitutive model for cyclic viscoplasticity and changes occurring in subsequent viscoplastic deformation due to the evolution of dislocation structures. The model considers the viscoplastic potential and a modified Ramberg–Osgood law. Stress is assumed to divide into three components: back stress (the center of the yield surface), flow stress (the radius of the yield surface), and viscous stress (overstress). The modification of the Ramberg–Osgood law is carried out employing memorized back stress. The applicability of the model to monotonic loading, pure creep, tension–compression cyclic loading, subsequent creep, and subsequent stress-relaxation were verified by comparing the predictions with experiments of Type 316L stainless steel at room temperature. The relationships between the internal variables in the model and the dislocation structures organized by cyclic deformations are also discussed.
関連URI: http://www.sciencedirect.com/science/journal/07496419
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/26212
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 眞山 剛

 

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