Failure Analysis of Shuttle Impact

**Explicit Dynamics Simulation of UAV Shuttle Impact with Flexible Barrier in LS-DYNA** This project involved the high-fidelity simulation of a UAV shuttle impacting a flexible, non-linear buffer system, conducted using explicit dynamics in LS-DYNA. The objective was to evaluate the structural response of the shuttle during high-speed deceleration and identify critical failure points. The simulation revealed significant stress concentrations and deformation zones at the moment of impact, particularly around joint interfaces and load-transfer regions. These insights directly informed the fabrication team, who reinforced specific structural elements to enhance overall durability and survivability under crash-like conditions. A key component of this work was the development of a customized material model for the buffer. Using empirical test data and curve-fitting techniques, I implemented a nonlinear viscoelastic response tailored to capture the buffer's energy-absorbing behavior under dynamic loads. This allowed accurate modeling of the force-displacement response during the collision event. The UAV shuttle comprises several sub-assemblies—such as dampers, articulated supports, and energy dissipators—that engage in a sequential mechanical response during deceleration. Accurately capturing this interplay was crucial for replicating real-world physics and validating the simulation results. The project demonstrated not only structural performance but also dynamic compatibility between moving components and energy-absorbing systems, ensuring both safety and reusability in off-nominal conditions.