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A platform for research: civil engineering, architecture and urbanism
Fracture mechanics of brick masonry: size effects and snap-back analysis
Abstract Fracture energy,GF, and the critical value of stress-intensity factor,KIC, are determined for brick masonry specimens tested in bending with different notch depths. The experimental results are compared with numerical simulations, obtained through a cohesive crack model developed originally for concrete. Theoretical and experimental load-deflection curves present very similar softening branches. In some cases, a snap-back instability is predicted by the model and confirmed by the experimental data. A size-scale transition appears evident from an ultimate strength collapse at the ligament to a brittle fracture due to stress-intensification. Such a transition demonstrates that LEFM is a very suitable model for brick masonry structures at the usual size-scale. A non-dimensional brittleness number is introduced as a measure of the LEFM applicability.
Fracture mechanics of brick masonry: size effects and snap-back analysis
Abstract Fracture energy,GF, and the critical value of stress-intensity factor,KIC, are determined for brick masonry specimens tested in bending with different notch depths. The experimental results are compared with numerical simulations, obtained through a cohesive crack model developed originally for concrete. Theoretical and experimental load-deflection curves present very similar softening branches. In some cases, a snap-back instability is predicted by the model and confirmed by the experimental data. A size-scale transition appears evident from an ultimate strength collapse at the ligament to a brittle fracture due to stress-intensification. Such a transition demonstrates that LEFM is a very suitable model for brick masonry structures at the usual size-scale. A non-dimensional brittleness number is introduced as a measure of the LEFM applicability.
Fracture mechanics of brick masonry: size effects and snap-back analysis
Bocca, Pietro (author) / Carpinteri, Alberto (author) / Valente, Silvio (author)
1989
Article (Journal)
English
Fracture mechanics of brick masonry: size effects and snap-back analysis
| Springer Verlag | 1989
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