Research Repository

See what's under the surface

Determination of material properties in the Chaboche unified viscoplasticity model

Gong, Y.P.; Hyde, Christopher J.; Sun, W.; Hyde, T.H.

Authors

Y.P. Gong

Christopher J. Hyde

W. Sun

T.H. Hyde

Abstract

An experimental programme of cyclic mechanical testing of a 316 stainless steel, at temperatures up to 600°C, under isothermal conditions, for the identification of material constitutive constants, has been carried out using a thermo-mechanical fatigue (TMF) test machine with induction coil heating. The constitutive model adopted is a modified Chaboche unified viscoplasticity model, which can deal with both cyclic effects, such as combined isotropic and kinematic hardening, and rate-dependent effects, associated with viscoplasticity. The characterization of 316 stainless steel is presented and compared with results from cyclic isothermal tests. A least-squares optimization algorithm has been developed and implemented for determining the material constants in order to further improve the general fit of the model to experimental data, using the initially obtained material constants as the starting point in this optimization process. The model predictions using both the initial and optimized material constants are compared to experimental data.

Journal Article Type Article
Publication Date Jan 1, 2010
Journal Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
Print ISSN 1464-4207
Electronic ISSN 2041-3076
Publisher SAGE Publications (UK and US)
Peer Reviewed Peer Reviewed
Volume 224
Issue 1
Institution Citation Gong, Y., Hyde, C. J., Sun, W., & Hyde, T. (2010). Determination of material properties in the Chaboche unified viscoplasticity model. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 224(1), doi:10.1243/14644207JMDA273
DOI https://doi.org/10.1243/14644207JMDA273
Keywords Unified viscoplasticity model, 316 stainless steel, Material property determination, Non-linear least-squares optimization
Publisher URL https://doi.org/10.1243/14644207JMDA273
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

Files

Gong - IMechE Part L 2010.pdf (2.3 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf




Downloadable Citations