DIN EN 14869-2:2011-07

DIN EN 14869-2 specifies a test method for determining the shear behaviour of an adhesive in a single lap joint bonded assembly when subjected to a tensile force. The test is performed on specimens consisting of thick, rigid adherends, with a short length of overlap, in order to obtain the most uniform distribution of shear stresses possible and to minimize other stress states which initiate failure. This test method may be used to determine the shear-stress against shear-strain curve to failure of the adhesive, the shear modulus of the adhesive, other adhesive properties that can be derived from the stress/strain curve such as the maximum shear stress and shear strain, the effect of temperature, environment, test speed, etcetera, on these properties. During testing, an adhesively bonded test specimen is subjected to a tensile force so that the adhesive is stressed in shear. The relative displacement of the adherends is measured using a purpose-built transducer located in the central region of the specimen. Force and displacement are measured from the start of application of the load until fracture of the specimen. The shear stresses and strains are then calculated from the bond dimensions. This edition supersedes the previous edition DIN EN 14869-2:2004. The Committee responsible for this standard is NA 062-04-55 AA "Prüfung von Konstruktionsklebstoffen, -klebverbindungen und Kernverbunden" ("Testing of structural adhesives, structural adhesive bondings and sandwiches") at DIN.