https://doi.org/10.1051/epjconf/20100642013
On a separating method for mixed-modes crack growth in wood material using image analysis
1
Clermont Université, Université Blaise Pascal, Laboratoire de
Mécanique et Ingénierie, EA 3867, BP 206, 63000
Clermont-Ferrand,
France
2
GEMH – GCD Laboratory, Limoges University, Civil
Engineering, 19300
Egletons
France
a e-mail: frederic.dubois@unilim.fr
Due to the complex wood anatomy and the loading orientation, the timber elements are subjected to a mixed-mode fracture. In these conditions, the crack tip advance is characterized by mixed-mode kinematics. In order to characterize the fracture process function versus the loading orientation, a new mixed-mode crack growth timber specimen is proposed. In the present paper, the design process and the experimental validation of this specimen are proposed. Using experimental results, the energy release rate is calculated for several modes. The calculi consist on the separation of each fracture mode. The design of the specimen is based on the analytical approach and numerical simulation by finite element method. The specimen particularity is the stability of the crack propagation under a force control.
© Owned by the authors, published by EDP Sciences, 2010
