A Hallal - Assistant Professor, Department of Mechanical Engineering, Lebanese International University, Beirut, Lebanon
M. Hammoud - Assistant Professor, Department of Mechanical Engineering, Lebanese International University, Beirut, Lebanon
M Ismail - Undergraduate Student, Department of Mechanical Engineering, Lebanese International University, Beirut, Lebanon
A Ismail - Undergraduate Student, Department of Mechanical Engineering, Lebanese International University, Beirut, Lebanon

n this work, a parametric study of mechanical properties for tri-axially braided composite is presented. The main parameters involved are: braided angle θ , fiber volume fraction Vf and fiber type. An analytical modeling is adopted to evaluate the 3D elastic properties and ultimate strengths. That model is based on a multi-scale homogenization method, the 3SHM (three Stages Homogenization Method). Tsai-Wu and Christensen Failure criteria and a damaged stiffness model are used to predict the failure of composites. A validation of the analytical model is done by a comparison with available experimental and numerical FE data. Then, the parametric study is performed. The main results that can be noticed are at θ around 50 degrees. For different types of fibers and Vf, the composite is almost in-plane isotropic, where in-plane Young’s moduli and tensile strengths are equal, and the highes values of in plane shear modulus and shear strength are shown.

Tri-axially braided composite, Elastic properties, Ultimate strengths, Homogenization