A New Method for Testing Wood Adhesives: Part I. the Specimen

Analysis of the block-shear and plywood-shear techniques for testing gluelines showed that the wood is highly stressed during testing whereas stresses are concentrated at the glue bond in many constructions undergoing severe exposure, and also that tensile forces are acting on glue joints exposed in service. A case is made for the use of a cross-lap type of specimen for glueline testing, on the grounds that it appears to possess sensitivity to adhesive and application variables, as well as controllability for observations of small differences among such variables.

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