3D Composite Fabric Staggered Weft Offset Warp
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Solution Overview
Problem
Existing 3D textile structures face challenges in balancing impact resistance and deformability, with current fabrics either compromising on linearity for impact resistance or complexity in production, and existing solutions either limit compression strength or complicate automated fabrication.
Innovation Solution
A 3D fabric weave pattern featuring staggered weft fibers and offset warp fibers in multiple planes, allowing for efficient force transfer and deformation, with a high fiber volume fraction and balanced fiber proportion, enabling effective impact resistance and compression strength while maintaining deformability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If 3D structures with fibers extending in three distinct directions are used to withstand stresses, then strength and linearity are improved, but device complexity increases and automated production becomes difficult
Solution Approach 1:
The fabric is divided into multiple plies (first ply, second ply, third ply) with fibers arranged in specific directions. Each ply contains fibers oriented to handle particular stress components, allowing the complex 3D stress distribution to be managed through segmented, specialized layers rather than a single complex structure.
Solution Approach 2:
Different regions of the fabric have different fiber orientations and densities tailored to local stress requirements. The first ply has fibers primarily in the first direction for compression, the second ply has fibers in the second direction for tension, and the third ply has fibers in the third direction for bending, creating locally optimized regions for different mechanical functions.
2Strength
If multi-ply fabrics are compressed to ensure advantageous fiber volume fraction, then compression strength is improved, but linearity of linking fibers deteriorates
Solution Approach 1:
The fabric employs asymmetric fiber orientations where the first ply has fibers predominantly in the first direction, the second ply has fibers predominantly in the second direction, and the third ply has fibers predominantly in the third direction. This asymmetric arrangement allows each ply to contribute differently to compression resistance while maintaining better overall linearity compared to symmetric arrangements.
Solution Approach 2:
The invention transitions from 2D planar fabric structures to a 3D multi-ply structure where fibers extend in three distinct directions. This dimensional change allows the fabric to achieve high fiber volume fraction and compression strength without sacrificing linearity, as the third dimension provides additional pathways for force transmission that reduce curvature in linking fibers.
3Strength
If non-orthogonal 3D fabrics are used to improve linearity, then compression resistance is improved, but impact resistance deteriorates due to large linking angles
Solution Approach 1:
The fabric merges three different ply structures with different fiber orientations into a single integrated multi-ply fabric. The first ply with fibers in the first direction, the second ply with fibers in the second direction, and the third ply with fibers in the third direction work together to provide both compression resistance and impact resistance, combining the advantages of each individual ply structure.
Solution Approach 2:
The invention creates a composite fabric structure where multiple plies with different fiber orientations are combined. This composite approach allows the fabric to exhibit properties that are superior to individual plies, achieving both good linearity for compression and appropriate linking angles for impact resistance through the synergistic combination of differently oriented fiber networks.
4Length of moving object
If stitching is used to link plies together, then linearity and reinforcement are improved, but impact resistance deteriorates
Solution Approach 1:
The invention replaces the mechanical stitching process with a weaving process that directly creates the multi-ply structure. By using a weaving machine to interlace fibers in the first, second, and third directions during fabric formation, the need for subsequent stitching is eliminated, maintaining linearity while improving impact resistance through direct structural integration.
Data Source
AI summary
A fabric includes a base pattern having at least twenty-eight weft fibers disposed in a staggered configuration and forming eight columns that comprise in alteration four weft fibers and three weft fibers, the weft fibers extending in seven layers. The fabric further includes at least twelve warp fibers disposed in at least four offset parallel planes, each of the planes containing at least three parallel warp fibers that follow paths that are distinct from one another.