Composite Container FRP Winding Optimization
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Solution Overview
Problem
In composite containers, the use of helical FRP layers for reinforcing both dome sections and the cylindrical section leads to increased weight and outer diameter, making them inefficient due to redundancy in reinforcement, particularly as the length of the cylindrical section increases.
Innovation Solution
The implementation of dome section reinforcing layers with continuously changing orientation angles around the cylindrical section, reducing the number of helical layers and minimizing FRP weight around the cylindrical section's center, while maintaining reinforcement through hoop layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If helical FRP layers are used to reinforce both dome sections and cylindrical section, then reinforcement strength is improved, but weight and outer diameter increase
Solution Approach 1:
The invention divides the reinforcement function into two separate FRP layers: a first FRP layer (hoop winding) dedicated to reinforcing the cylindrical section, and a second FRP layer (helical winding) dedicated to reinforcing the dome sections. This segmentation eliminates redundant reinforcement in the cylindrical section by the second layer, thereby reducing overall material usage and weight while maintaining necessary strength in both regions.
Solution Approach 2:
The invention applies different winding patterns and material properties to different sections of the container. The first FRP layer uses hoop winding specifically for the cylindrical section where circumferential stress is highest, while the second FRP layer uses helical winding specifically for the dome sections where complex stress patterns occur. This localized optimization ensures each section receives appropriate reinforcement without over-reinforcing other areas.
2Strength
If helical FRP layers are used to reinforce both dome sections and cylindrical section, then reinforcement strength is improved, but outer diameter increases
Solution Approach 1:
By segmenting the reinforcement into two specialized layers, the first layer provides efficient hoop reinforcement for the cylindrical section with minimal diameter increase, while the second layer provides targeted helical reinforcement for the dome sections. This prevents the cumulative diameter increase that would occur with multiple overlapping helical layers covering the entire container.
3Strength
If multiple helical layers are used for reinforcement, then strength is improved, but FRP weight around cylindrical section center increases redundantly
Solution Approach 1:
The invention segments the reinforcement function so that the first FRP layer handles cylindrical section reinforcement through hoop winding, eliminating the need for the second FRP layer to provide redundant reinforcement in this region. The second layer is restricted to dome section reinforcement through helical winding, optimizing material distribution and reducing total FRP quantity.
Solution Approach 2:
The invention changes the winding parameters between layers: the first layer uses hoop winding (winding angle approximately 90 degrees) optimized for cylindrical section reinforcement, while the second layer uses helical winding (winding angle 0-45 degrees) optimized for dome section reinforcement. This parameter differentiation ensures each layer contributes uniquely to reinforcement without redundancy.
Data Source
AI summary
A composite container is provided where FRP layers are formed by winding FRP around a metal liner so that the dome sections are reinforced while limiting an increase in the weight. The FRP layers include a hoop layer that covers the entirety of the cylindrical section in hoop winding, and dome section reinforcing layers that also cover as least the portions of the cylindrical section near the dome sections. In the dome section reinforcing layers, FRP are wound in helical form in such a manner that the orientation angle of the FRP over the cylindrical section relative to the direction of the axis of the liner continuously changes towards the center of the cylindrical section, and thus, the weight of FRP near the center of the cylindrical section is reduced.