The thesis was developed at Avio Aero with the aim of analyzing the airfoil clashing technology for turbofan LPT overspeed prevention. The overspeed is a condition when an engine is allowed to exceed its design limit. If out of control, it can cause a hazardous event. For this reason, EASA and FAA impose requirements to guarantee the engine safety in all working conditions. Overspeed can be related to a shaft failure. In this situation, the broken part, being no longer slowed by the fan, continues to accelerate under the action of hot gases. According to the architecture of the engine, which affects the possibility of the damaged part to translate or not, are provided different overspeed detection and control systems.