Examination of the source of differences among the fracture mechanics properties of wood and wood-based materials obtained by different methods and establishment of the novel characterization methods

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Although the fracture mechanics properties of wood and wood-based materials are essentially the material parameters as well as the elastic properties and strengths, it has been suggested that they are often dependent on the measurement methods and specimen configurations. This dependence is though to be because of the ignorance of nonlinear behaviors ahead of the crack tip. In this study, several methods for characterizing the fracture mechanics properties of wood and wood-based materials were proposed while considering the nonlinear behaviors induced at the crack tip. In addition, the methods proposed in this study were also effective for predicting the strength properties of a crack-free specimen as well as those of the specimen with a crack.