3D Woven Deployment Portions With Angled Weft Columns
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Solution Overview
Problem
Three-dimensional woven fibrous structures experience angular shifts and detachment issues during deployment, leading to misalignment and mechanical property modifications due to shear forces, particularly in turbine ring sectors.
Innovation Solution
A method of three-dimensional weaving with weft yarns in deployment portions, where the weft yarns are juxtaposed in a stacking direction forming an angle between 60° and 80°, preferably 70°, to compensate for angular variations caused by shear forces during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If three-dimensional weaving is performed with weft yarns in perpendicular stacking direction, then the fibrous structure can be manufactured, but angular shifts and detachment occur during deployment due to shear forces
Solution Approach 1:
The patent applies preliminary action by pre-calculating and pre-setting the initial stacking direction of weft yarns in deployment portions to a specific angle (60°-80°) before weaving. This preliminary configuration compensates for the angular variation that will occur during subsequent deployment, preventing detachment and maintaining alignment precision without requiring complex real-time adjustments during manufacturing.
Solution Approach 2:
The patent changes the stacking direction parameter of weft yarns from the conventional perpendicular (90°) to a specific angle range (60°-80°) in deployment portions. This parameter modification allows the fibrous structure to accommodate shear forces during deployment while maintaining fiber alignment and preventing detachment, thus resolving the contradiction between manufacturability and precision.
2Shape
If deployment portions are folded during shaping, then the fibrous structure can be formed into final shape, but shear forces cause angular variation and misalignment
Solution Approach 1:
The patent applies preliminary anti-action by introducing a counteracting angular offset in the initial weaving configuration. The weft yarns are deliberately positioned at an angle (60°-80°) that opposes the expected angular variation from folding, thereby preemptively counterbalancing the destabilizing effect of shear forces and maintaining alignment stability throughout the shaping process.
3Device complexity
If weft yarns are positioned perpendicular to longitudinal direction, then weaving process is simplified, but detachment occurs at internal radius during deployment
Solution Approach 1:
The patent applies local quality by differentiating the stacking direction of weft yarns between different regions of the fibrous structure. In deployment portions, the weft yarns are positioned at an angle (60°-80°) rather than perpendicular, creating a localized structural adaptation that prevents detachment at the internal radius while maintaining the simplicity of the overall weaving process.
Data Source
AI summary
In a method for three-dimensional weaving of a fibrous structure between layers of warp yarns and layers of weft yarns, the weft yarns are woven in a plurality of columns spaced apart from one another in a longitudinal direction. The method includes weaving deployment portions in the fibrous structure that is interwoven with an adjacent portion, the weft yarns of the weft yarn columns of the adjacent portion being juxtaposed in a first stacking direction perpendicular to the longitudinal direction. During the process of weaving the deployment portions, the weft yarns of each weft yarn column are positioned against the fell of the fibrous structure in stacking directions that are different from the first stacking direction.