Modification of Hardening Parameter for Computational Plasticity, pages: 647-650

Mehmet Hanifi DOĞRU

Özet


Hardening can be defined as increase in the strength of a material due to plastic deformation. A type of hardening, which is work hardening, is performed under the cold working conditions. In metallic solids permanent change of shape is generally carried out on a microscopic scale by defects called dislocations which are created by stress. In addition, Hardening parameter is so critic for the computational plasticity. In this study, the hardening parameter, which has emerged from the variation of yield surface equation, has been considered. It has been isolated from hardening rule and investigated that the parameter must have a unique value for any hardening rule.


Anahtar Kelimeler


Hardening parameter, hardening rule, elasto-plasticity.

Referanslar


Guzelbey I.H., “Finite and boundary element analysis of elasto-plastic finite strain contact problems”. Ph.D. Thesis, Cranfield University, Cranfield Institute of Technology, (1992).

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Prager W., “The theory of plasticity: a survey of recent achievements”, Proc. Instn Mech. Engrs, 169: 41-57, (1955).

Ziegler H., “A modification of prager's hardening rule”, Quarterly Applied Mathematics, 17: 55-65, (1959).

Pifko A., Levine H.S., Armen H., Levy A. “Nonlinear Analysis of Structures”. NASA CR-2351, NASA, Washington D.C., (1974).

Allen, D. H. “A note on the combined isotropic-kinematic work hardening rule”. IJNME, 15: 1724-1728, (1980).

Zienkiewicz O.C., Taylor L.C. “The Finite Element Method”, Mc Graw Hill., (1991).


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