IJE TRANSACTIONS A: Basics Vol. 15, No. 4 (November 2002) 315-324   

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S. A. Sadrnejad

Department of Civil Engineering, K.N.Toosi University of Technology
Teheran, Iran, sadrnejad@hotmail.com
( Received: May 26, 2002 – Accepted in Revised Form: October 03, 2002 )

Abstract    A framework for development of constitutive models based on semi-micromechanical aspects of plasticity is proposed. The resulting of this model for material employed friction type failure criterion, sub-loading surface, and associated flow rule. This model is capable of predicting effects of the rotation of principal stress/strain axes and consequent plastic flow, induced anisotropy of strength, particularly, in cyclic loading. Also, this model has the potential of predicting the behavior of fully inherent anisotropic material, and strain history distributions at a point up to failure. The predicted model results and their conformity with experimental results of cyclic loading including the pre-failure specifications show the capability of the mode.


Keywords    Multi-Laminate Framework, Sub-Loading Surface Model, Elastic-Plastic, Cyclic Loading



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