Size effect on strength and fracture energy for numerical concrete with realistic aggregate shapes
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Fracture of concrete at the scale of the aggregate structure (or smaller) is a complicated process. Simple simulation models may be of help in understanding fracture in more detail, provided that the material structure is incorporated in as much detail as possible. A combined approach using computed tomography and image processing allows us to model concrete close to reality. The shape of the aggregates is included in a 3D beam lattice model for fracture. Fracture of concrete beams is simulated under 3-point bending with different sizes, aggregate densities and aggregates shapes, focusing on the size effect on structural strength and fracture energy.
KeywordsComputed tomography Aggregate structure Oval-shaped aggregates Crushed aggregates Numerical concrete 3D lattice model
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- Lilliu G (2007) Analysis of 3D fracture processes in concrete. PhD thesis, TU DelftGoogle Scholar
- Lingen FJ (2000) Design of an object-oriented finite element package for parallel computers. PhD thesis, TU DelftGoogle Scholar
- Man H-K, Van Mier JGM (2007) Size and shape effects of fracture strength of concrete. In: Carpinteri A, Gambarova P, Ferro G, Plizarri G (eds) Fracture mechanics of concrete and concrete structures (FraMCoS-6). Taylor & Francis Group, London, pp 39–44Google Scholar
- Meyer D, Man H-K, Van Mier JGM (2007) Fracture of foamed cementitious materials: a combined experimental and numerical study. In: Zhao H, Fleck NA (eds) Proceedings IUTAM symposium on ‘mechanical properties of cellular materials’, LMT-Cachan, Paris, France, September 17–21, 2007. Kluwer Academic Publishers, Dordrecht (in press)Google Scholar
- Schlangen E (1993) Experimental and numerical analysis of fracture processes in concrete. PhD thesis, TU DelftGoogle Scholar
- Scrivener K (1989) The microstructure of concrete. In: Skalny IJ (eds) Materials science of concrete. The American Ceramic Society Westerville, OH, p 127Google Scholar
- Simioni S, Tschenett T (2007) Analysis of size-effects on fracture strength for concretes containing realistic aggregate particles. BSc thesis, Department of Civil, Environmental and Geomatic Engineering, ETH ZurichGoogle Scholar
- Van Mier JGM, Man H-K (2008) Some notes on microcracking, softening, localization and size effects. Int J Damage Mech. Special Issue in memoriam of D. Krajcinovic (in press)Google Scholar
- Van Vliet MRA (2000) Size effect in tensile fracture of concrete and rock. PhD thesis, TU DelftGoogle Scholar
- Vervuurt A (1997) Interface fracture in concrete. PhD thesis, TU DelftGoogle Scholar
- Weibull W (1939) A statistical theory of the strength of materials. Roy Sweden Acad Eng Sci Proc 151: 1–45Google Scholar