Advanced techniques for estimation of the tensile fracture toughness of adhesive joints

摘要: Adhesive bonding has become more efficient in the last few decades due to adhesives developments, granting higher strength and ductility. As a result, are being increasingly used industries such as automotive, aerospace construction. Thus, it is highly important predict of bonded joints assess feasibility joining during fabrication process components (e.g. complex geometries) or for repairing purposes. When using Finite Element Method with advanced propagation laws, tensile (Gnc) shear (Gsc) fracture toughness adhesive must be determined accuracy. Several conventional methods obtain Gnc Gsc exist literature, mainly based on Linear Elastic Fracture Mechanics (LEFM). The J-integral technique accurate measure these parameters high In this work, by Double-Cantilever Beam (DCB) test. An optical measurement method developed evaluation crack tip opening adherends rotation at test, supported Matlab® sub-routine automated extraction quantities. output an that allows easier quicker than available proposed (by technique) some results presented regarding different geometry adherend material.