Verification and Validation of a Rapid Design Tool for the Analysis of the Composite Y-Joint of the D8 Double-Bubble Aircraft

Polymer composite joints are critical aerospace components for reinforcing lightweight structures and achieving high eco-efficiency transportation standards. Optimizing complex structural is an iterative process. Fast reliable numerical approaches needed to overcome the runtime limitations of high-fidelity finite element (FE) modeling. This work proposes a computationally efficient approach based on design tool, HyperX. Verification against FE models experimental validation presented Y-joint in D8 double-bubble fuselage. Results show that failure load predicted within 10% recorded. Two parametric studies performed study effects curvature joint (110-160 deg) skin thickness (16, 24, 32 ply) predictions using stress-based criterion. The maximum occurred with 130 deg curvature. 32-ply was have highest load. prove applicability rapid optimization analysis faster, design.