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Title
  • en A constitutive model of cyclic viscoplasticity considering changes in subsequent viscoplastic deformation due to the evolution of dislocation structures
Creator
Accessrights open access
Subject
  • Other en Constitutive model
  • Other en Creep
  • Other en Stress-relaxation
  • Other en Cyclic loading
  • Other en Viscoplastic material
  • Other en Mechanical testing
  • Other en Dislocation structures
  • NDC 563.6
Description
  • Abstract en 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.
Publisher en Elsevier
Date
    Issued2007-05
Language
  • eng
Resource Type journal article
Version Type AM
Identifier HDL http://hdl.handle.net/2115/26212
Relation
  • URI http://www.sciencedirect.com/science/journal/07496419
  • isVersionOf DOI https://doi.org/10.1016/j.ijplas.2006.10.003
Journal
    • PISSN 0749-6419
      • en International Journal of Plasticity
      • Volume Number23 Issue Number5 Page Start915 Page End930
File
    • fulltext IJP23-5.pdf
    • 1.5 MB (application/pdf)
      • Issued2007-05
Oaidate 2023-07-26