Multidirectional Core Member for Aircraft Rotor Blade Stiffness

The patent applies dimensionality change by transitioning from a unidirectional core configuration (cell members normal to skins) to a multidirectional configuration with cell members oriented at various angles (e.g., 0°, 45°, 90°). This angular dimensionality provides strength and stiffness in multiple loading directions simultaneously, resolving the contradiction between directional performance and structural complexity.

The patent employs composite material principles by creating a core structure that combines cell members of different orientations and potentially different materials properties. This composite core configuration integrates the strengths of individual cell orientations to achieve superior overall directional strength and stiffness while managing structural complexity through systematic design.

The patent applies segmentation by dividing the core into distinct regions or layers with different cell member orientations. Each segment is optimized for specific loading conditions, allowing the core to achieve high reliability in multiple directions. This segmented approach enables modular manufacturing processes, where each segment can be fabricated and then assembled, thereby managing manufacturing complexity.

The patent utilizes parameter changes by varying the orientation angles, material properties, and geometric parameters of cell members to optimize directional strength and stiffness. These parameter variations are systematically controlled during manufacturing, allowing for tailored mechanical performance while using standardized manufacturing techniques to maintain ease of production.

The patent resolves this contradiction by introducing angular dimensionality to the core structure. Cell members are oriented at multiple angles (e.g., 0°, 45°, 90°) rather than uniformly normal to the skins, enabling the core to bear loads in multiple directions. This multidirectional configuration increases load-bearing capacity while maintaining manageable structural complexity through systematic angular distribution.

The patent applies local quality by tailoring the cell member orientation and properties in specific regions of the core to match the local loading conditions. Areas experiencing different stress patterns have differently oriented cell members, optimizing load-bearing capacity locally. This localized optimization increases overall force capacity without requiring complex global restructuring of the entire core.