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Microplane modeling of cyclic behavior of concrete: a gradient plasticity‐damage formulation
Author(s) -
Zreid Imadeddin,
Kaliske Michael
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610196
Subject(s) - plasticity , softening , monotonic function , finite element method , structural engineering , compression (physics) , constitutive equation , tension (geology) , yield (engineering) , materials science , anisotropy , yield surface , mechanics , coupling (piping) , mathematics , composite material , engineering , mathematical analysis , physics , quantum mechanics
A microplane model is developed to simulate the behavior of concrete under cyclic loading conditions. Pure damage mechanics or pure plasticity models yield satisfactory results for concrete under monotonic loading but cannot capture correctly the unloading and reloading response. Therefore, coupling damage and plasticity is necessary for accurate constitutive modeling of concrete. The microplane model offers a straightforward approach to simulate induced anisotropy by formulating the material laws on many randomly oriented planes. Distinguishing between compression and tension response using the proper plastic yield function and damage laws is considered. Furthermore, gradient enhancement is employed to handle the pathological mesh sensitivity related to strain softening. The new formulation is implemented within a 3D finite element code and a numerical example is simulated and compared to experiments in order to evaluate the capabilities of the model. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)