Development of a mathematical model of winding made of non-impregnated aramid fibers for strength analysis of the combined fan case in GTE compressor blade separation

The design of a combined case with wound non-impregnation aramid fibers is presented. The main purpose of winding non-impregnation aramid fibers is to prevent the departure of the blade beyond the design of the engine. Wound non-impregnation aramid fibers - a new trend in security systems for aircraft gas turbine engines. Such systems are very cost-effective (value for money) to solve, for example, the problem of localization of the fragments of the engine when the blade is broken, since the threads have high specific strength per unit of weight. In this regard, the introduction of engine design combined body is a very promising solution. The principle of operation of a combined case is as follows: compressor blade breaks into contact with the adjacent blades and the housing. Metal case partially destroyed. Fragment blade engages through a metal casing with a thread wound to absorb the main part of the impact energy and keep the blade fragment to the drawing and friction with each other. For the proposed options to protect the body from Flight of the blade turbine engine developed a mathematical model based on the design of the complex LS-DYNA. The created model is verified by the results of field experiments and used to calculate the retention case cut short blades of a gas turbine engine.