Boundary Element Analysis of Fretting in Anisotropic Materials under Centrifugal Loads

Resumo

This work presents a boundary element method (BEM) formulation for analyzing frictional contact problems, with a focus on fretting behavior in anisotropic materials subjected to centrifugal forces. A two-dimensional elastic BEM framework is developed, incorporating displacement constraints and force equilibrium to model the mechanical interaction between contacting bodies. The contact problem is inherently nonlinear, as the initial contact area is unknown and evolves throughout the loading process. To account for centrifugal body forces, domain integrals are exactly converted into equivalent boundary integrals using the radial integration method. The proposed formulation is applied to a representative aeronautical application involving contact between an anisotropic single-crystal metallic blade and an isotropic metallic rotor. Numerical results are compared with those obtained via the finite element method (FEM) to validate the accuracy and efficiency of the approach.