Open Access

ARTICLE

A Plastic Damage Model with Stress Triaxiality-Dependent Hardening for Concrete

by X.P. Shen¹, X.C. Wang¹

1 North China University of Technology, Beijing 100041, China.
2 Shenyang University of Technology, Shenyang 110870, China.

Computers, Materials & Continua 2014, 39(2), 135-152. https://doi.org/10.3970/cmc.2014.039.135

Abstract

Emphases of this study were placed on the modelling of plastic damage behaviour of prestressed structural concrete, with special attention being paid to the stress-triaxiality dependent plastic hardening law and the corresponding damage evolution law. A definition of stress triaxiality was proposed and introduced in the model presented here. Drucker-Prager -type plasticity was adopted in the formulation of the plastic damage constitutive equations. Numerical validations were performed for the proposed plasticity-based damage model with a driver subroutine developed in this study. The predicted stress-strain behaviour seems reasonably accurate for the uniaxial tension and uniaxial compression compared with the experimental data reported in references. Numerical calculations of compressions under various hydrostatic stress confinements were carried out in order to validate the stress triaxiality dependent properties of the model.

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