Abstract
The fracture behavior in orthogonal cutting of wood material was observed by high resolution camera, considering the fracture of Sugi (Japanese cedar) wood in terms of porous cellular solids. The result showed that the previous check with macro crack propagation in cutting of sugi wood meant the growth of cleavage in intercellular layer. The fracture of cleavage in cellular solids such as wooden material was not only observed in the intercellular layer but also in the lumina with micro cleavage. In addition to above fracture appeared in individual cell wall, the other fracture behavior of slant rupture and vertical rupture was observed along the plural cell.
