RESEARCH ARTICLE


Anisotropic Nonlinear Elastic Model of Concrete and Secondary Development in ABAQUS



Wei Sun, Yansheng Huang*
Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China


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Creative Commons License
© Sun and Huang; Licensee Bentham Open

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China; Tel: +86 13560040090; E-mail: cvyhuang@scut.edu.cn


Abstract

In order to solve the convergence problem of concrete constitutive in the softening phase, an anisotropic nonlinear elastic constitutive model (ANECM) was proposed, which was developed based on the uniaxial concrete constitutive relation in the Chinese code for design of concrete structures (GB 50010-2010). The user material subroutine (UMAT) based on ANECM is developed in ABAQUS software. The above UMAT is applied to analyze a simulation model in ABAQUS software. The result shows that compared to the default plastic-damage concrete constitutive in ABAQUS, ANECM is an effective and appropriate model to simulate the performance of concrete and it has improved the convergence problem.

Keywords: ABAQUS software, Anisotropic nonlinear elastic constitutive model, Convergence problem, Concrete constitutive relation, Simulation model, User material subroutine.