Finite Transition Elements for Cst to 3-Node Timoshenko Beam Elements

Effective finite element analysis of mechanical structures needs to use proper finite elements for modeling machine parts. The selection of finite elements is very important for the accuracy and reliability of the solution. If machine components are of complex shapes, there often appears a need to use different types of finite elements for modeling sub-areas of the considered element. These various types of finite elements are to be connected by properly selected transition finite elements. In the paper the application of transition finite elements for connection of plane CST (constant strain triangular) and 3-node Timoshenko beam elements is presented. The use of the transition elements enables to couple structural and continuum elements without using constraint equations. As an example a cantilever beam is considered which is fixed by one transitional element to the base. The numerical simulation’s results showed that it is very important to choose the appropriate finite element adapted to the corresponding sub-areas as well as the proper design of the transition element.