Numerical modeling of bonded joints in aircraft structures of composites material using 3D boundary element method

Author(s)

Carlos Alexandre Oliveira de Souza

• Document type: Master's Dissertation
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Mecânica
• Defense date: 2009-07-31

Examining board members

Paulo Sollero; Euclides de Mesquita Neto; Eduardo Martins Sampaio

• Advisor: Eder Lima de Albuquerque; Paulo Sollero

Abstract

The use of bonded, riveted and bolted joints to assemble components or structural parts is inevitable in aeronautic industries. The design of bonded joints is based upon analyses to estimate peeling and shear stresses in the adhesive and the displacement field along the bonded region. The objective of this work is to develop a computational tool using the Matlab® software to solve numerically the bonded lap joints problem in composite materials for aeronautical structures in 3D context. The numerical method to be employed for solving governing differential equations is the Boundary Element Method (BEM) and Sub-Regions Technique. For this implementation, rectangular constants and discontinuous elements were considered, which means that nodes don't share degrees of freedom. In this work is used the Fundamental Solution for Anisotropy obtained by Radon transform which was previously implemented by Santiago (2008). Besides the Anisotropic Fundamental Solution, also is implemented a function containing the Isotropic Fundamental Solution with the objective of validating the code with analytical results available in literature for this case. (AU)

• FAPESP's process: 07/06405-1 - Numerical Modeling of Bonded Joints in Aircraft Structures of Composite Material using 3D Boundary Elements Method
• Grantee: Carlos Alexandre Oliveira de Souza
• Support Opportunities: Scholarships in Brazil - Master