Turbine Disk Bore Geometry for Stress Distribution

The patent applies curvature by replacing sharp corners and discontinuities with rounded fillets and smooth transitions. Specifically, the bore geometry includes rounded corners and curved transition surfaces instead of sharp edges, and the web-bore intersection features a curved fillet radius that smoothly connects the web to the bore wall. This eliminates stress concentration points while maintaining structural integrity.

The patent implements local quality by applying different geometric characteristics to different regions of the disk. The bore region features rounded corners and curved transitions, the web includes variable thickness with filleted edges, and the rim has specific contouring. Each region is optimized locally to eliminate stress concentrations while maintaining overall disk performance.

The patent segments the disk into distinct functional regions with optimized characteristics: a thin web region for weight reduction, a reinforced bore region with rounded geometry for stress distribution, and a contoured rim for structural support. The web thickness varies radially, being thinner at certain regions and thicker at others, allowing weight optimization while maintaining strength where needed.

The patent changes geometric parameters throughout the disk structure to optimize both weight and strength. The web thickness varies from the bore outward, the bore radius and shape are specifically dimensioned, and fillet radii are carefully selected. These parameter variations allow the disk to be lighter while maintaining adequate stress distribution through strategic reinforcement zones.