The approach regarding the plastic process as a constrained optimization problem (Simo, J. C., and Hughes, T. J. R., 1998, Computational Inelasticity, Springer, New York) is discussed and found to be limited in considering nonlinear kinematic hardening and mechanical dissipation. These limitations are virtually common in elastoplastic modeling in both theoretical studies and industrial applications. A modified maximum mechanical dissipation principle is proposed to overcome the limitations and form an energy-based framework of nonlinear hardening laws. With the control functions introduced into the framework, not only are the relationships between existing hardening models clarified against their ad hoc origins, but modeling nonsaturating kinematic hardening behavior is also achieved. Numerical examples are presented to illustrate the capability of the nonsaturating kinematic hardening model to describe the phenomena of the permanent softening as well as the cyclic loading. These applications indicate the concept of the control function can be nontrivial in material modeling. Finally, the methodology is also extended to incorporate the multiterm approach.
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November 2013
Research-Article
Modified Maximum Mechanical Dissipation Principle for Rate-Independent Metal Plasticity
Jun Chen,
Jun Chen
1
e-mail: jun_chen@sjtu.edu.cnDepartment of Plasticity Technology,
Shanghai Jiao Tong University
,Shanghai 200030
, China
1Corresponding author.
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Xinhai Zhu,
Xinhai Zhu
Livermore Software Technology Corporation
,Livermore, CA 94551
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Jian Cao
Jian Cao
Department of Mechanical Engineering,
Northwestern University
,Evanston, IL 60208
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Jun Chen
e-mail: jun_chen@sjtu.edu.cnDepartment of Plasticity Technology,
Shanghai Jiao Tong University
,Shanghai 200030
, China
Xinhai Zhu
Livermore Software Technology Corporation
,Livermore, CA 94551
Jian Cao
Department of Mechanical Engineering,
Northwestern University
,Evanston, IL 60208
1Corresponding author.
Manuscript received November 30, 2012; final manuscript received January 4, 2013; accepted manuscript posted February 14, 2013; published online August 21, 2013. Editor: Yonggang Huang.
J. Appl. Mech. Nov 2013, 80(6): 061020 (9 pages)
Published Online: August 21, 2013
Article history
Received:
November 30, 2012
Revision Received:
January 4, 2013
Accepted:
February 14, 2013
Citation
Xiao, Y., Chen, J., Zhu, X., and Cao, J. (August 21, 2013). "Modified Maximum Mechanical Dissipation Principle for Rate-Independent Metal Plasticity." ASME. J. Appl. Mech. November 2013; 80(6): 061020. https://doi.org/10.1115/1.4023685
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