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Tensile cracking in concrete and sandstone: Part 2—Effect of boundary rotations
Abstract This paper contains the second part of our work on tensile cracking that has been conducted over the past years. The behavioural of concrete and sandstone subjected to uniaxial tension is decribed. In part 1 of this paper [1], a numerical lattice model is presented, which is used for explaing fracture mechanisms in heterogenous materials like concrete and sandstone. In the lattice model, the material is schemitzed as a lattice of brittle, breaking beam elements. Cracking is simulated by removing, in each step, the element with the highest stress—to—strength ratio. It was shown that the amount of detail included in the numerical model has a significant effect on the ductility in the load-displacement diagram. In this paper, special attention is given to the effect of varying the rotational stiffiness of the loading platens in uniaxial tensile tests. Experiments are presented of cylindrical specimens of various sizes loaded in tension between non-rotating (fixed) and freely-rotating boundaries. The lattice model is used for a qualitative analysis of the subject. The results suggest that the uniaxial tensile test between freely rotating boudaries yields a (safe?) lower bound for the fracture energy of concrete.
Tensile cracking in concrete and sandstone: Part 2—Effect of boundary rotations
Abstract This paper contains the second part of our work on tensile cracking that has been conducted over the past years. The behavioural of concrete and sandstone subjected to uniaxial tension is decribed. In part 1 of this paper [1], a numerical lattice model is presented, which is used for explaing fracture mechanisms in heterogenous materials like concrete and sandstone. In the lattice model, the material is schemitzed as a lattice of brittle, breaking beam elements. Cracking is simulated by removing, in each step, the element with the highest stress—to—strength ratio. It was shown that the amount of detail included in the numerical model has a significant effect on the ductility in the load-displacement diagram. In this paper, special attention is given to the effect of varying the rotational stiffiness of the loading platens in uniaxial tensile tests. Experiments are presented of cylindrical specimens of various sizes loaded in tension between non-rotating (fixed) and freely-rotating boundaries. The lattice model is used for a qualitative analysis of the subject. The results suggest that the uniaxial tensile test between freely rotating boudaries yields a (safe?) lower bound for the fracture energy of concrete.
Tensile cracking in concrete and sandstone: Part 2—Effect of boundary rotations
Van Mier, Jan G. M. (author) / Schlangen, Erik (author) / Vervuurt, Adri (author)
1996
Article (Journal)
English
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
Tensile Cracking In Concrete And Sandstone - Part 2: Effect of Boundary Rotations
| British Library 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 1—Basic instruments
| Springer Verlag | 1996