Investigation of Effect of Fiber Directions on Deformation of Wood under Shearing Loads Using Electronic Speckle Pattern Interferometry

摘要

This study investigates the effect of the directions of fibers of wood on the two-dimensional deformation of wood under shearing loads measured using an electronic speckle pattern interferometry (ESPI) technique. The radical, tangential and end sections of Douglas firs are used as specimens in the longitudinal direction. Results reveal that the deformation values significantly vary with parts, and the directions of earlywood and latewood, which compose the annual ring, have an effect on the two-dimensional deformation and failure of wood.