Apex control within an elasto-plastic constitutive model for confined concretes
| Autor: | Carmelo E. Majorana, B. Pomaro, Gianluca Mazzucco, Valentina Salomoni |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Multiaxial stress state
Work (thermodynamics) Materials science General Computer Science Yield surface Constitutive equation 010103 numerical & computational mathematics 02 engineering and technology Plasticity 01 natural sciences Theoretical Computer Science law.invention Softening law FOS: Mathematics 0202 electrical engineering electronic engineering information engineering Mathematics - Numerical Analysis 0101 mathematics Numerical Analysis Applied Mathematics Numerical analysis Apex Computational plasticity Computer Science (all) Modeling and Simulation Numerical Analysis (math.NA) Mechanics Nonlinear system 020201 artificial intelligence & image processing Hydrostatic equilibrium |
| Zdroj: | Mathematics and Computers in Simulation. 162:221-232 |
| ISSN: | 0378-4754 |
| DOI: | 10.1016/j.matcom.2018.12.017 |
| Popis: | This work focuses on the numerical modelling of confined concretes when subjected to multiaxial loading accounting for a nonlinear material response. Particularly, an improved return mapping procedure is here presented to cope with the issue of singularities (corners) in the yield surface, able to catch locally the optimal return point on the active yield surface. The algorithm is applied to the Menetry and Willam's yield surface, with a plastic potential as suggested by Grassl and the softening law proposed by Cervenka suitable for concrete materials. The model capabilities to reproduce the confined behaviour of concrete, as well as its post-peak behaviour, and to predict perfect plasticity or softening are here discussed. The proposed approach can be applied to any elastoplastic material with singular yield surface along the hydrostatic axis. Comment: 17 pages, 13 figures |
| Databáze: | OpenAIRE |
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