Wood: a quasibrittle material R-curve behavior and peak load evaluation
| Autor: | Morel, Stéphane, Dourado, Nuno, Valentin, Gérard, Morais, José |
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| Přispěvatelé: | LABORATOIRE DE RHEOLOGIE DU BOIS DE BORDEAUX (LRBB), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA)-Université Sciences et Technologies - Bordeaux 1, Universidade de Trás-os-Montes e Alto Douro |
| Rok vydání: | 2005 |
| Předmět: |
Engineering
[SDV]Life Sciences [q-bio] Computational Mechanics Building material 02 engineering and technology Bending engineering.material 0203 mechanical engineering [SDV.IDA]Life Sciences [q-bio]/Food engineering R-CURVE [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering ComputingMilieux_MISCELLANEOUS business.industry Linear elasticity Mode (statistics) Function (mathematics) Structural engineering 021001 nanoscience & nanotechnology Connection (mathematics) 020303 mechanical engineering & transports Mechanics of Materials Peak load Modeling and Simulation Fracture (geology) 0210 nano-technology business |
| Zdroj: | International Journal of Fracture International Journal of Fracture, Springer Verlag, 2005, 131 (4), pp.385-400. ⟨10.1007/s10704-004-7513-0⟩ |
| ISSN: | 1573-2673 0376-9429 |
| DOI: | 10.1007/s10704-004-7513-0 |
| Popis: | From load-unloading cycles applied on wood notched specimens subjected to three-point bending, we show that the concept of ‘equivalent LEFM’, usually used for the quasibrittle materials, can be successfully applied to the fracture behavior of wood in mode I. Within this equivalent linear elastic framework, the quasibrittle fracture behavior of wood leads to an R-curve which is evaluated and discussed. On the other hand, the estimate of the peak load (or maximum load) of a structure as a function of the corresponding R-curve is an important problem for a building material such as wood. After a review of some general results about the connection between the R-curve and the shape of the load-deflection curve, we propose a single equation, i.e., valid for a fracture test under load-control or displacement-control, allowing to estimate the crack length corresponding to every extremum of a load-deflection curve. |
| Databáze: | OpenAIRE |
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