Abstract
In order to investigate the influence of longitudinal cracks on the bearing capacity of wood beams, the simulation models of cantilever beam and simply supported beam with cracks were established based on the FEM and XFEM. Through the simulation, influence of the cracks on stress distribution and bearing capacity of the beams are discussed. Simulation results show that longitudinal crack has an effect of homogenizing the stress field in the wood beam, which is helpful to improve the overall displacement bearing capacity of the beam. Considering that survival with injuries is the normal state of wooden structures, the damage tolerance theory of wood structure can be developed. Therefore, this paper is a preliminary attempt in this field. However, the more complex microstructure of wood will make the damage process more complex. In the future, it is necessary to carry out targeted research, which can not only establish the damage tolerance theory for wood components, but also inspire more in-depth thinking and research in bionics.
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