Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Effective elastic properties of concrete by a 3D computational homogenization approach
Submission Author:
Wanderson Ferreira dos Santos , GO , Brazil
Co-Authors:
Wanderson Ferreira dos Santos, Welington Hilário Vieira
Presenter: Wanderson Ferreira dos Santos
doi://10.26678/ABCM.COBEM2023.COB2023-1161
Abstract
This work explores a 3D computational homogenization approach to predict the effective elastic properties of concrete. The computational framework is implemented in ANSYS® Mechanical, Release 18.0 using the Ansys Parametric Design Language (APDL). In particular, the effect of heterogeneity observed at the mesoscale is modeled by the concept of Representative Volume Element (RVE), which encompasses the size distribution of aggregates inserted into the cementitious matrix. An algorithm is implemented to create coarse aggregates following a specified grading curve. Sets of 3D RVEs with different particle volumes are generated by varying the size and positions of the aggregates. Uniform strain and periodic boundary conditions are imposed on the RVEs to assess their influence on the effective constitutive behavior. The RVE models are numerically simulated using the Finite Element Method (FEM) and the effective properties are computed using average-based homogenization theory. The results for effective properties are compared with other works available in the literature, including numerical and experimental results. In summary, the homogenization strategy employed in this work provides results in close agreement with the compared studies in the literature.
Keywords
concrete, effective elastic properties, computational homogenization approach, Heterogeneity at mesoscale, boundary conditions
