This thesis investigates the mechanical characterization of Variable Stiffness Composites, also known as Variable Angle Tow (VAT) composites. These materials are gaining prominence in the aerospace industry due to their superior mechanical properties compared to traditional metallic alloys. Unlike conventional composites, VAT composites allow for the continuous variation of fiber orientation within the laminate, which enhances structural performances by optimizing the distribution of stiffness and strength. However, this adds complexity also makes their modeling and analysis more challenging. The research presented in this thesis addresses the complexity of analyzing VAT composites using finite element methods (FEM). The study uses the commercial software ABAQUS, combined with Python scripting, to simulate and solve structural problems in a synergistic manner.