Dynamic analysis for turbine blade-shaving and thin-wall casing containment evaluation in an aero-engine

This study investigates the dynamic mechanism of turbine blade-shaving and the containment performance of multi-thin-wall casings (stacked casings) under blade-off events in aero-engines. An integrated implicit–explicit finite element framework is developed to analyze the transient interactions between released blades and surrounding casings. Results reveal a sequential evolution of blade detachment, inter-blade collision, fragment accumulation, and casing deformation. Dynamic response analysis demonstrates that the first and second casings exhibit progressive bulging and tearing when impact energy exceeds local containment capacity, whereas the third casing prevents fragment egress through substantial plastic deformation. The proposed modeling approach enables high-fidelity prediction of failure progression and offers engineering insights into the optimization of casing design for enhanced containment safety.