Asemi-automatic method to determine the wood failure percentage on shear test specimens

An alternative method to quantitatively determine the wood failure percentage on shear test specimens was developed, experimentally tested and successfully applied to specimens with typical combinations of adhesive types and wood species used by the glulam industry in Switzerland. The method consists of astaining technique for abetter differentiation of wood fibers and adhesive, and an image processing procedure for astandardized estimation of the fractured surface ratio covered by wood fibers and adhesive, respectively. The semi-automatic method allows for amore objective determination of wood failure percentage and is suitable for quality control in the glulam industr