Abstract
The new potential proposed in [1] is used to modify Concrete Damaged Plasticity [2] model. The formulas for plastic multiplier and elastoplastic stiffness tensor are derived and simple numerical test are performed to confirm validity of the change. Predictions of the modified model and the original model are compared. The comparison shows similar character of the resultant curves, although for some cases a distinct quantitative difference between the models is revealed.
Highlights
The main goal of this paper is to confirm that the potential proposed in Part I [1] is valid for concrete
Concrete Damaged Plasticity model available in Abaqus [2] is modified - the new function is introduced in the yield condition instead of Lubliner function [3]
The calibration of the yield condition was shown in Part I [1], but to be able to compare the results of numerical tests with empirical data, calibration of the whole model needs to be performed
Summary
The main goal of this paper is to confirm that the potential proposed in Part I [1] is valid for concrete. For this purpose, Concrete Damaged Plasticity model available in Abaqus [2] is modified - the new function is introduced in the yield condition instead of Lubliner function [3]. As proven in the preceding article, the considered function is differentiable for all stress states, which allows to derive elastoplastic modulus tensor for damaged material in a concise way. The considered material model describes elastoplastic behaviour with isotropic damage. Several tests for concrete are shown along with comparison to the original model predictions
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