Non-linear computational homogenization experimentsNon-linear computational homogenization experiments Πλήρης Δημοσίευση σε Συνέδριο Conference Full Paper 2015-10-122013enNumerical homogenization is based on the usage of finite elements for the description of average properties of materials with heterogeneous microstructure. The practical steps of the method and representative examples related to masonry structures are presented in this paper. The non-linear Representative Volume Element (RVE) of the masonry is created and solved within COMSOL Multiphysics. Parametric analysis has been chosen and used for the description of the loading. Thus, several RVE models with gradually increasing loading are solved. Results concerning the average stress and strain in the RVE domain are then calculated, by using the subdomain integration of COMSOL. In addition, the tangent stiffness is estimated for each loading path and loading level. Finally, two databases for the tangent stiffness and the stress are created, metamodels based on MATLAB interpolation are used, and an overall non-linear homogenization procedure of masonry macroscopic structures, in a FEM2 approach, is considered. Results are compared with direct heterogeneous macro models.http://creativecommons.org/licenses/by/4.0/COMSOL Conference in Rotterdam Stavroulakis Georgios Σταυρουλακης Γεωργιος Giannis Konstantinos Γιαννης Κωνσταντινος Drosopoulos Georgios Δροσοπουλος Γεωργιος Stavroulaki Maria Σταυρουλακη Μαρια Greek mathematics mathematics greek greek mathematics