Relation Between Interface Geometry and Tensile Shear Strength of Ultrasonically Welded Joints

Abstract The reliable use of ultrasonic metal welding requires a thorough understanding the relevant bonding mechanisms. This article presents an approach to systematically investigate relation between mechanical properties and interface selected Al/Cu Al/GFRP joints. hypothesis is that microstructure tensile shear strength specimen can be related their presented by contact stiffness damage initiation traction. For this purpose, mentioned hybrid material systems were ultrasonically welded using specific parameters achieve defined levels joint strengths. Micro sections fracture surfaces characterized identify geometry at certain levels. main findings different shares bonded areas in characteristic micro geometries. Microscale finite element models representative samples developed determine stress deformation behavior under load compare influence on conditions simplified model. simulations provide information about tractions geometrical characteristics joints’ interfaces, as well contribution overall strength. prospective industrial applications, they serve basis for further development model component scale.