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Computers and Concrete Volume 1, Number 2, May 2004 , pages 169-188 DOI: https://doi.org/10.12989/cac.2004.1.2.169 |
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A coupled damage-viscoplasticity model for the analysisrnof localisation and size effects |
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Kak Tien Chong, R. Ian Gilbert and Stephen J. Foster
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| Abstract | ||
| A coupled damage-viscoplasticity model is presented for the analysis of localisation and sizerneffects. On one hand, viscosity helps to avoid mesh sensitivity because of the introduction of a lengthrnscale in the model and, on the other hand, enables to represent size effects. Size effects were analysed byrnmeans of three-point bending tests. Correlation between the fracture energy parameter measuredrnexperimentally and the density fracture energy modelling parameter is discussed. It has been shown thatrnthe dependence of nominal strength and fracture energy on size is determined by the ligament length inrncomparison with the width of the fracture process zone. | ||
| Key Words | ||
| damage viscoplasticity; fracture energy; size effect; localisation | ||
| Address | ||
| URGC Structures , INSA de Lyon, Villeurbanne France ,rnTU Delft, Faculty of Civil Engineering and Geosciences, Delft, The NetherlandsrnURGC Structures , INSA de Lyon, Villeurbanne, France | ||