3D Woven Fibrous Blank With Alternating Planes for Reinforced Junctions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing fibrous blanks for turbomachine parts result in weakly reinforced junctions and uneven fiber lengths, leading to excessive stresses and poor fiber distribution, particularly at the edges and ends of the parts.
Innovation Solution
A fibrous blank is produced through three-dimensional weaving with alternating weaving planes, where warp yarns of different portions cross in specific areas to ensure consistent fiber length and reduced stress, facilitating easy shaping and improved reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional weaving with disconnections is used to deploy leg portions, then the fibrous blank can be shaped to form complex geometries, but the junction areas become weakly reinforced with uneven fiber lengths and excessive stresses
Solution Approach 1:
The patent introduces a third dimension by alternating weaving planes (first and second planes) for different yarn groups. This allows yarns to cross in three-dimensional space rather than being constrained to a single plane, enabling complex geometries to be formed while maintaining fiber continuity and reinforcement at junction areas through spatial redistribution of yarn paths.
2Shape
If multiple bends of fibers are introduced at junctions to enable deployment, then the fibrous blank can be shaped into complex forms, but unwanted stresses are generated in the fibers
Solution Approach 1:
The patent segments the yarn system into multiple independent groups (first, second, third, fourth yarn groups), each following different paths through the weaving structure. This segmentation allows each yarn group to be independently routed through different weaving planes, reducing the number of bends required for any single yarn while still achieving the overall complex geometry through coordinated deformation of multiple yarn groups.
3Strength
If yarns are crossed at the bottom of disconnections to reinforce junctions, then fiber distribution improves, but the complexity of the weaving pattern increases
Solution Approach 1:
The patent applies different weaving configurations to different spatial locations within the fibrous blank. Specifically, certain yarn groups cross in the first weaving plane while other yarn groups cross in the second weaving plane at different locations. This localized differentiation of weaving patterns allows reinforcement to be precisely targeted at junction areas without requiring the entire fabric to follow a complex crossed pattern, thereby reducing overall weaving complexity while maintaining local reinforcement where needed.
Data Source
AI summary
A fibrous blank produced by weaving and including at least one first disconnection, the first disconnection separating first and second woven portions in the blank, wherein the fibrous blank has an alternation between a first weaving plane and a second, different weaving plane.