Bond Strength of Wood Adhesives: The Sensitivity of Standard Test Methods to Imperfections

Abstract

The aim of this paper is to highlight some drawbacks and uncertainties related to possible imperfections associated with the use of key European and American standard test methods on shear strength measurement of wood adhesive bonds. For this purpose, a brief introduction is provided on adhesive bonding of wood materials and relevant failure modes under shear stress. Two standardized test methods for measuring the shear strength of wood adhesives are introduced, followed by a discussion around the drawbacks and imperfections related to the practical application of the two test methods. Finally, the research needs in this area are highlighted and some recommendations are made for addressing them in the future studies.