Study on Damage Factor of ABAQUS Concrete Plastic Damage Model

摘要

ABAQUS, as a large-scale non-linear finite element analysis software, is widely used in mechanical engineering structure calculation. Among them, the plastic damage model of concrete is recognized as the most effective model to simulate the inelastic behavior of concrete under repeated loads. It is widely used in the time history calculation and analysis of high-rise buildings, In mechanical engineering, this model is also needed to study the failure mechanism of mechanical cutters on concrete. But in the application of ABAQUS concrete plastic damage model, users need to input the tensile and compressive damage factor-inelastic strain parameter table. ABAQUS does not give the corresponding parameter table of concrete with different strength. Based on the research results of the former and the uniaxial constitutive relation of concrete recommended in the Code for the Design of Concrete Structures, this paper further studies the fitting equation of the tensile and compressive damage factorinelastic strain curve of various strength concrete by means of numerical analysis method, which makes up for the vacancy of ABAQUS and makes the plastic damage model of concrete more suitable and more accurately. The damage factor equation under this study can provide an effective reference for concrete research and greatly facilitate the concrete analysis of later scholars.