Optimization of Containment Shield Using LS-DYNA

The potential hazard resulting from uncontained turbine engine rotor blade failure has always been the long-term concern of each aero engine manufacturer. Usually, there are many factors involving the engine containment capability which need to be reviewed during engine design such as; case thickness, rotor support structure, blade weight and shape. By using INCONEL 625 alloy which is austenitic nickel-chromium-based superalloy, which is resistant to oxidation and corrosion and this material is well suited for service in extreme environment i.e., subjected to high pressure and kinetic energy. The first structure was a flat plate representing a standard case configuration. The second structure was a flat plate with a convex curve section at the impact point. The curved surface was designed to force the blade to deform plastically, dissipating energy before the full impact of the blade is received by the plate. The curved geometry of the casing was able to tolerate the higher impact velocity before failure. The computation model was developed and study is performed using ANSYS –LS DYNA. The optimization of weight is considered, by optimizing the shape of the casing by plane geometry to the convex curve geometry of casing.