Author(s)

J.S. Poulsen & E. Byskov

Abstract

Compression failure in form of kink band formation in spruce (Picea Abies) is investigated in this paper. A simple micromechanical model for the kink band angle on the tangential-longitudinal face, involving the shape of the imperfections and elastic constants of the material, is investigated. It is shown that incipient kinking, which takes place just before peak stress, depends on the size of the local fiber misalignment and the longitudinal shear strength. Finally the kink band broadening behavior under steady- state stress is discussed. 1 Introduction Kinking is recognized to be the major compressive-strength limiting failure mechanism in clear wood, reducing the compression strength in the fiber direction to about half the tensile strength, [1] and [2]. Pouls

Keywords