Fractal dimension analysis of void size in wood-strand composites based on X-ray computer tomography images

Oriented strandboards were constructed from various combinations of mixed hardwood flakes. Fractal dimension of Void size (FDVS) in the manufactured samples was studied by means of X-ray computer tomography images and a computer image processing technique. The FDVS value was high in the panel surface layers and decreased toward the panel center, and the FDVS decrement was linear to increased porosity. At the same overall porosity level, the FDVS varied as function of void distribution. FDVS could be a useful additional parameter for characterizing the internal void structure of strand-based wood composites.