Curved Radial Flange Vane Segment for CMC Stress Management

The airfoil is divided into multiple segments (first platform, airfoil section, second platform) that can be separately manufactured and then assembled. This segmentation allows each component to be optimized for its specific function while distributing stress concentrations across multiple joints and interfaces rather than requiring the entire structure to withstand peak stresses.

The patent employs ceramic matrix composite (CMC) materials that combine ceramic fibers with a matrix material to create a composite structure. This composite approach provides both the high-temperature resistance of ceramics and improved toughness and stress resistance compared to monolithic ceramics, enabling the airfoil to withstand aerodynamic and thermal stresses.

The support structure transitions from point-based or line-based support to area-based support through the use of platforms with circumferential support surfaces. The first and second platforms provide distributed support areas that contact the airfoil section over extended surfaces, transforming stress distribution from concentrated points to distributed areas and reducing peak stress concentrations.

The platforms feature curved circumferential support surfaces that conform to the aerodynamic shape of the airfoil. These curved surfaces distribute loads more evenly by avoiding sharp corners and abrupt geometric transitions that would create stress concentrations, allowing smooth stress flow across the support interfaces.