A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Meso-mechanical modeling of ultra-lightweight concretes
A numerical model was developed at the meso-mechanical level, to investigate the behaviour of a lightweight concrete based on spherical expanded clay aggregates used in a preceding study. Due to computational limitations, the authors had to deviate from the original model, i.e. simplifying its geometry by increasing the diameter of the aggregates. The numerical modelling was performed using Ansys in order to evaluate the applicability of meso-mechanical models derived from commercial software. The author's experience has turned out to be positive, since most of the expected behaviour could be verified on three classical experimental setups: axial compression, axial tension and splitting strength tests. All features resulting from the complex material properties, including the interface, could be implemented into their numerical model. Although the previously cited limited computer resources prevented the authors to "test" the accuracy of their numerical modelling on their own experimental data, the experience has shown that it is per se possible to perform complex meso-mechanical modelling using standard commercial software. Since the performed numerical modelling can at best being considered at having taken place at the level of a Representative Volume Element (RVE), the authors will in a subsequent step, using extended hardware capacities, refine their model in order to achieve the experimental proof of their approach.
Meso-mechanical modeling of ultra-lightweight concretes
A numerical model was developed at the meso-mechanical level, to investigate the behaviour of a lightweight concrete based on spherical expanded clay aggregates used in a preceding study. Due to computational limitations, the authors had to deviate from the original model, i.e. simplifying its geometry by increasing the diameter of the aggregates. The numerical modelling was performed using Ansys in order to evaluate the applicability of meso-mechanical models derived from commercial software. The author's experience has turned out to be positive, since most of the expected behaviour could be verified on three classical experimental setups: axial compression, axial tension and splitting strength tests. All features resulting from the complex material properties, including the interface, could be implemented into their numerical model. Although the previously cited limited computer resources prevented the authors to "test" the accuracy of their numerical modelling on their own experimental data, the experience has shown that it is per se possible to perform complex meso-mechanical modelling using standard commercial software. Since the performed numerical modelling can at best being considered at having taken place at the level of a Representative Volume Element (RVE), the authors will in a subsequent step, using extended hardware capacities, refine their model in order to achieve the experimental proof of their approach.
Meso-mechanical modeling of ultra-lightweight concretes
Mesomechanische Modellbeschreibung von Ultraleichtbetonen
Vallee, T. (author) / Oppel, M. (author) / Tannert, T. (author)
2010
8 Seiten, 7 Bilder, 20 Quellen
Conference paper
English
| Engineering Index Backfile | 1948
| UB Braunschweig | 1963
| TIBKAT | 1963
Mechanical and thermophysical properties of lightweight aggregate concretes
| Online Contents | 2015