Analytical and numerical computation of combined mechanical Roebel bar properties

Roebel bars are typically made of several different composite materials which are jointed together in a complex production process. Afterwards, they are embedded inside the stator slots of large synchronous machines. Investigations on the mechanical deformation problem in the electrical machine have to take account of each assembled anisotropic part. For simplicity, the separate modeling of the detailed anisotropic structure of each Roebel bar is often avoided. Thus, it is absolutely necessary to describe the complex mechanical behavior of inlaid Roebel bars with a single combined modulus of elasticity. Such common mechanical properties are investigated with the aid of analytical and numerical methods for an accurate replacement in the deformation problem.