Semi-analytical model development for preliminary study of 3D woven Composite/Metallic flange bolted assemblies

This research deals with the development of a new semi-analytical model for composite-metal eccentric tensile bolted joints casing structures. The is based on direct stiffness method considering structural elements, where flanges are modeled axisymmetric shell bolt beam element and contact behavior specific number compressive linear springs, identified by means convergence tests. A hybrid added in order to set link between flange bolt. Since intended preliminary design including composite materials, we propose an extension matrix formulation isotropic elements orthotropic ones. validated respect 2D FE model. Then, established assembly approximately corresponding real aircraft engine. Design criteria such as normal stress bolt, bending moment axial load at section flange, given compared 3D computation. Results very good agreement offers considerable time saving computation was 120 times faster than Moreover, relative error does not exceed 2% 9% which satisfactory approach. However, due element, less accurate results were observed displacement it would be advisable consider formulation. will detailed future work. Finally, parametric study showed ability predict physical proved its usability running optimization studies reliability tool.