Fabric-Reinforced Pressure Container for Axial and Hoop Strength
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Solution Overview
Problem
Pressure containers used in natural gas and hydrogen fuel cells are heavy due to their metal construction, leading to poor fuel efficiency, and require reinforcement in the axial direction to withstand high internal gas pressures.
Innovation Solution
A fiber structure with a fabric reinforcement base material that covers a liner, featuring yarns arranged in a circumferential direction for radial reinforcement and axial direction for enhanced axial reinforcement, using a multi-layered fabric with binder yarns and matrix resin impregnation for increased strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal pressure container is used, then the container has high strength and reliability, but the weight increases significantly
Solution Approach 1:
The patent applies composite materials by combining a metal liner with a fiber-reinforced plastic layer. The liner provides gas impermeability and basic strength, while the fiber-reinforced plastic layer provides additional pressure resistance with lower weight. This composite structure achieves the required strength while significantly reducing the overall weight compared to pure metal containers.
2Ease of manufacture
If the fiber reinforcement base material uses yarns arranged at an angle to the axial direction, then the manufacturing process is simpler, but the axial reinforcement effectiveness is reduced
Solution Approach 1:
The patent applies local quality by differentiating the yarn arrangement in different regions. In the dome-shaped portions, the yarns are arranged to follow the curvature of the surface, providing optimal local reinforcement. In the cylindrical body portion, the yarns are arranged parallel to the axial direction to maximize axial strength. This region-specific arrangement optimizes both manufacturing feasibility and reinforcement effectiveness.
Data Source
AI summary
A fiber structure that includes a liner, and a fiber reinforcement base material formed of a fabric. The fiber reinforcement base material externally covers a body portion and a dome-shaped portion of the liner, and includes first yarns and second yarns. The first yarns are arranged such that a direction in which a yarn main axis of each of the first yarns in the body portion and the dome-shaped portion proceeds is a circumferential direction of the liner. The second yarns are arranged such that a direction in which a yarn main axis of each of the second yarns in the body portion proceeds is an axial direction of the body portion and that a direction in which a yarn main axis of a portion of each of the second yarns arranged in the dome-shaped portion proceeds is an axial direction of the dome-shaped portion.