A non-unified creep plasticity constitutive model and a unified creep-plasticity model have been considered. In the non-unified model, creep and plastic strains were added separately; in the unified model, they were treated in a unified manner. These models were used to predict cyclic hardening and mean stress relaxation for isothermal loading conditions. The results indicate that certain instabilities occured in unified creep-plasticity simulations at low temperatures. Material behavior for thermal loading was studied using the two-bar structure. Both constitutive models were modified to handle material behavior changes with temperature. The thermal loading response was predicted satisfactorily with both models for most cases. However, certain model limitations were encountered in the unified model. The capabilities of both models are outlined and discussed.
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October 1986
Research Papers
Constitutive Models Suitable for Thermal Loading
D. Slavik,
D. Slavik
Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
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Huseyin Sehitoglu
Huseyin Sehitoglu
Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
Search for other works by this author on:
D. Slavik
Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
Huseyin Sehitoglu
Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
J. Eng. Mater. Technol. Oct 1986, 108(4): 303-312 (10 pages)
Published Online: October 1, 1986
Article history
Received:
June 24, 1985
Online:
September 15, 2009
Citation
Slavik, D., and Sehitoglu, H. (October 1, 1986). "Constitutive Models Suitable for Thermal Loading." ASME. J. Eng. Mater. Technol. October 1986; 108(4): 303–312. https://doi.org/10.1115/1.3225887
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