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

Mayama, T.; Sasaki, K.; Ishikawa, H.

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

Mayama, T.; Sasaki, K.; Ishikawa, H.

International Journal of Plasticity, 2007, 23(5), 915-930

Permalink : https://hdl.handle.net/2115/26212

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アクセス権	open access
URI	https://hdl.handle.net/2115/26212
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. ; Sasaki, K. ; Ishikawa, H.
著者名 Mayama, T.
e-Rad_Researcher 90215715 著者名 Sasaki, K.
著者名 Ishikawa, H.
言語	英語
キーワード	Constitutive model
	Creep
	Stress-relaxation
	Cyclic loading
	Viscoplastic material
	Mechanical testing
	Dislocation structures
発行日	2007-05
出版者	Elsevier
収録物名	International Journal of Plasticity
巻(号)	23(5)
ページ	915-930
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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0749-6419
関連情報	URI http://www.sciencedirect.com/science/journal/07496419
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.ijplas.2006.10.003