A None-Associated Cap Plasticity with Isotropic-Kinematic Hardening-Softening Rule

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Seyedein, Soheil |

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Type of Document: M.Sc. Thesis
Language: English
Document No: 39269 (53)
University: Sharif University of Technology, International Campus, Kish Island
Department: Science and Engineering
Advisor(s): Khoei, Amir Reza
Abstract:
The constitutive modeling of material is clearly a keystone of successful quantitative solution possibilities. No finite element code will provide results of better quality than that of the constitutive equation implemented in it. In this study, a nonassociated three-invariant cap plasticity model is presented for material under compressive stress. Generalized single-cap plasticity is developed which is based on the hardening-softening material functions. The hardening functions are consisted of isotropic and kinematic parts. Using the definition of yield surface, material functions and nonlinear elastic behavior, as function of hardening-softening parameters, the constitutive elasto-plastic matrix and its components are derived. The procedure for determination of material parameters is described.Finally, the applicability of the proposed model is demonstrated in numerical simulation of some material under different confining pressures corresponding to the set of triaxial tests. The study concludes that remarkable agreement is observed between experimental and numerical results
Keywords:
Constitutive Modeling ; Concrete ; Pressure ; Hardening ; Softening ; Nonassociates Plasticity ; Isotropic-Kinematics

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