The following proposal deals with the development and numerical implementation of a damage model formulation for the estimation of static and fatigue failures of bonded joints in composite material structures for aeronautic applications. The constitutive model is implemented on Abaqus finite element software through a Fortran VUMAT subroutine. The verification of the proposed approach is divided in two steps: First, the damage model is validated at coupon level for static and fatigue loadings using experimental results from the open literature. Finally, the proposed approach is validated using experimental data collected at ITA using a representative section of a composite stiffened panel structure with bonded stiffeners.The main goal of this project is to improve the robustness of the numerical methods for design and analysis of bonded joints in composite material structures, combining the state-of-art numerical methods with efficient damage and degradation models.This innovative proposal fits within the current research and development topics at ITA, in a close partnership with Embraer, for the development of novels design and fabrication methods for composite structures for aeronautic applications.
News published in Agência FAPESP Newsletter about the scholarship: