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A platform for research: civil engineering, architecture and urbanism
Measurement of the fracture energy using three-point bend tests: Part 3—influence of cutting theP-δ tail
Abstract Available measures of the fracture energyGF obtained with the procedure proposed by RILEM TC-50 provide values that appear to change with sample size, calling into question the possibility of consideringGF as a material parameter. In previous papers several sources of energy dissipation were analysed and it was concluded that, although important, they were not enough to account for the measured size effect. Here, the dissipated energy at the very end of the test is analysed. It is shown that this energy cannot be neglected for small specimens if the tests are interrupted at a reasonably low rotation. When this energy is taken into account, the final values ofGF appear to be almost size-independent. This result supportsGF as a material parameter and provides further confidence in the RILEM proposal. Moreover, it furnishes a physical explanation for the perturbed ligament model previously developed by the authors.
Measurement of the fracture energy using three-point bend tests: Part 3—influence of cutting theP-δ tail
Abstract Available measures of the fracture energyGF obtained with the procedure proposed by RILEM TC-50 provide values that appear to change with sample size, calling into question the possibility of consideringGF as a material parameter. In previous papers several sources of energy dissipation were analysed and it was concluded that, although important, they were not enough to account for the measured size effect. Here, the dissipated energy at the very end of the test is analysed. It is shown that this energy cannot be neglected for small specimens if the tests are interrupted at a reasonably low rotation. When this energy is taken into account, the final values ofGF appear to be almost size-independent. This result supportsGF as a material parameter and provides further confidence in the RILEM proposal. Moreover, it furnishes a physical explanation for the perturbed ligament model previously developed by the authors.
Measurement of the fracture energy using three-point bend tests: Part 3—influence of cutting theP-δ tail
Elices, M. (author) / Guinea, G. V. (author) / Planas, J. (author)
1992
Article (Journal)
English