the invention relates to a method for the application of a function or joint element to an elastically deformable planar material or workpiece , the function element having a rivet section on a contact surface , extending beyond said surface , wherein the application of the function element to the planar material is achieved in a jointing and riveting process by introduction of the section into a joint opening and by plastic deformation of the river section in a rivet connection engaging behind the joint opening , wherein , in a boundary region enclosing the joint opening , the planar material is held under tension between the deformed rivet connection and the contact surface of the function element .