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Tensile cracking in concrete and sandstone: Part 1—Basic instruments
Abstract In this paper, the behaviour of concrete and sandstone specimens subjected to uniaxial tension is described in detail. The results are a summary of the work completed over the past years and will be presented in two parts. A lattice model has been developed, which is used to explain the behaviour observed in laboratory-scale specimens. The model, which will be outlined in this first paper, adopts a perfectly elastic brittle fracture law at the meso-level (particle level) of the material and is capable of simulating crack face bridging in the softening regime quite realistically. The comparison with crack patterns observed in a series of vacuum impregnation tests is quite favourable. Although the crack patterns compare well, the load-deformation diagrams calculated with the model are still too brittle in comparison with experimentally-measured load-displacement responses. Neglecting the small particles in the material structure and omitting the third dimension in the analyses are two reasons for the overrated brittleness and are worked out in this paper. Because of the localised nature of the fracture process in the softening branch, the specimen size and boundary conditions must have a significant effect on the process. The effect of boundary rotations is analysed in part 2 of this paper.
Tensile cracking in concrete and sandstone: Part 1—Basic instruments
Abstract In this paper, the behaviour of concrete and sandstone specimens subjected to uniaxial tension is described in detail. The results are a summary of the work completed over the past years and will be presented in two parts. A lattice model has been developed, which is used to explain the behaviour observed in laboratory-scale specimens. The model, which will be outlined in this first paper, adopts a perfectly elastic brittle fracture law at the meso-level (particle level) of the material and is capable of simulating crack face bridging in the softening regime quite realistically. The comparison with crack patterns observed in a series of vacuum impregnation tests is quite favourable. Although the crack patterns compare well, the load-deformation diagrams calculated with the model are still too brittle in comparison with experimentally-measured load-displacement responses. Neglecting the small particles in the material structure and omitting the third dimension in the analyses are two reasons for the overrated brittleness and are worked out in this paper. Because of the localised nature of the fracture process in the softening branch, the specimen size and boundary conditions must have a significant effect on the process. The effect of boundary rotations is analysed in part 2 of this paper.
Tensile cracking in concrete and sandstone: Part 1—Basic instruments
Vervuurt, Adri (author) / Schlangen, Erik (author) / Van Mier, Jan G. M. (author)
1996
Article (Journal)
English
Tensile Cracking in Concrete and Sandstone - Part 1: Basic Instruments
| British Library Online Contents | 1996
Tensile cracking in concrete and sandstone: Part 1—Basic instruments
| Springer Verlag | 1996
TENSILE CRACKING IN CONCRETE AND SANDSTONE - PART 1: BASIC INSTRUMENTS
| Online Contents | 1996
Tensile cracking in concrete and sandstone: Part 2—Effect of boundary rotations
| Online Contents | 1996
Tensile cracking in concrete and sandstone: Part 2—Effect of boundary rotations
| Springer Verlag | 1996