INFLUENCE OF THE DILATANCE ANGLE ON THE COMPRESSION STRESS STRAIN CURVES OF CONCRETE USING THE PLASTIC DAMAGE MODEL

Abstract

The Plastic Damage Model (MDP) considers the degradation of concrete over time. He bases his formulation on the mechanics of solids, particularly on the theory of plasticity and on the theory of continuous damage. The adjustment of this constitutive model requires the introduction of the dilatancy angle (Ψ) on which there is no consensus regarding the value to be considered in the modeling process. In the present work, a study is carried out on the influence of this parameter on the behavior of the stress-strain curve of concrete in cylindrical specimens with the use of the Plastic Damage Model from a computational mathematical model developed in the Abaqus program, calibrated and validated with the experimental results reported in the consulted bibliography. Dilation angle values ​​of 15º, 30º and 38º are used, in addition the compressive strength of the concrete is modified considering values ​​of 20, 25, 30 and 35 MPa. The influence of the dilatancy angle on the stresses, strains and graphs of stress vs. strain of concrete is demonstrated.