Print Email Facebook Twitter Generalization of non-iterative numerical methods for damage-plastic behaviour modeling Title Generalization of non-iterative numerical methods for damage-plastic behaviour modeling Author Graca-e-Costa, R. Alfaiate, J. Dias-da-Costa, D. Sluys, L.J. Faculty Civil Engineering and Geosciences Department Structural Engineering Date 2013-03-14 Abstract Modelling fracture in concrete or masonry is known to be problematic regarding the robustness of iterative solution procedures and, the use of non-iterative methods (or that minimize the use of iterations) in quasi-brittle materials is now under strong development, due to the necessity to obtain effective results in finite element analysis [1, 2] where strong non-linearities emerge that are otherwise unwieldy to model. In the proposed lecture, two new methods designated as Non-Iterative Energy based Method (NIEM) and Automatic presented in [1, 3] are applied with extension to modelling damage-plastic behaviour. The new methods combine an incremental-total procedure with the preferential use of incremental steps, switching to the total approach only at critical bifurcation points. The development of the load-unloading abilities is allowed by these incremental/total methods, which take advantage of keeping the material’s stress/strain memory due to the preferential use of an incremental procedure. A new approach to the unload-load cycles is used in the scope of a noniterative procedure, which will mitigate the numerical difficulties inherent to cyclic loading. The formulation for both methods for structures with both softening and hardening behaviour is presented and a structural example where the numerical results are compared with experimental results. Subject non-iterative energy based methoddamage-plastic unloadingdiscrete crack approachnon-iterative analysis To reference this document use: http://resolver.tudelft.nl/uuid:c09d8c7f-e140-40be-ab91-545bf902cda7 Publisher Cimne ISBN 978-84-941004-0-6 Source FraMCos-8: Proceedings of the 8th International Conference on Fracture Mechanics of Concrete and Concrete Structures, Toledo, Spain, 10-14 March 2013 Part of collection Institutional Repository Document type conference paper Rights (c) 2013 The Author(s) Files PDF Costa.pdf 960.09 KB Close viewer /islandora/object/uuid:c09d8c7f-e140-40be-ab91-545bf902cda7/datastream/OBJ/view