NUMERICAL STUDY OF THE PRESTRESSED CONNECTORS AND THEIR DISTRIBUTION ON THE STRENGTH OF A SINGLE LAP, A DOUBLE LAP AND HYBRID JOINTS SUBJECTED TO UNIAXIAL TENSILE TEST

摘要

Prcslressed joints arc widely used in construction using connectors in the form of screws, whose task is to strong clamping of joined parts, thereby the internal forces in joint are transferred by surface friction contact of the elements. In the automotive and aerospace industries hybrid joints are more widely applied. Mechanical connectors arc added to the adhesive joint in form of rivets, screws or clinch increasing its strength properties. The aim of this study was to determine how the prestresscd connectors influence the mechanical response of hybrid, single and double lap joints. The influence of different distribution of the connectors was also investigated. Numerical study was conducted in ABAQUS program. Mechanical connectors were modeled by using fasteners, that allowed for a considerable simplification of the numerical model. In their application, there is no need for an additional submodels for connectors in the form of the rivet or the bolt. Prestressing is activated by direct application of the force to the connector.