Effect of the thermosensitivity and reinforcement structure on the load-carrying capacity of metal-composite gas-turbine disks

The direct problem of calculating three-layered reinforced rotating disks with account of thermosensitivity of their substructural elements is formulated. Based on this problem and a strength criterion for the substructural elements of the disk, the inverse problem on determining its load-carrying capacity at a given profile of the disk and reinforcement structure of the load-carrying layer is stated. The calculation results for a magnesium-steel disk with a fixed geometry and different reinforcement structures are presented. It is shown that the thermosensitivity of the substructural elements lowers considerably the load-carrying capacity at elevated temperatures. The isotropic steel and quasi-isotropic reinforced disks, most often used in practice, are inefficient compared with spirally and radially reinforced ones: for magnesium-steel disks, the best are the structures with a radial and radially circumferential reinforcement.