Composite Gas Tank Winding Layout for Lower Fiber Use
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Solution Overview
Problem
Existing high-pressure gas tanks with fiber bundle layers have excessive fiber bundle amounts in small diameter end portions due to uniform distribution based on trunk strength, leading to inefficiencies.
Innovation Solution
A tank design with a fiber bundle layer comprising an inner, intermediate, and outer layer, where the intermediate layer is positioned axially inward of the fiber bundle layer end, reducing the amount of fiber bundles used while maintaining strength, and an optional adhesive layer to prevent fraying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fiber bundle layer is uniformly distributed throughout the tank body, then the strength is ensured, but the fiber bundle amount becomes excessive at the small diameter end portion
Solution Approach 1:
The fiber bundle layer is divided into an inner layer and an outer layer with different fiber bundle amounts. The inner layer has a larger fiber bundle amount to ensure strength in the barrel portion, while the outer layer has a smaller fiber bundle amount suitable for the small diameter end portion. This local differentiation allows the tank to achieve both strength and material efficiency.
Solution Approach 2:
The fiber bundle layer is segmented into multiple layers (inner layer and outer layer) with different properties. The inner layer is disposed at the inner side and the outer layer at the outer side, creating a layered structure that optimizes fiber bundle distribution throughout the tank body, particularly reducing fiber usage at the small diameter end while maintaining overall strength.
2Strength
If the fiber bundle amount is determined based on the strength of the trunk portion, then the trunk portion strength is ensured, but the small diameter end portion becomes excessive in fiber bundle amount
Solution Approach 1:
The invention applies local quality by creating different fiber bundle densities in different regions. The inner layer provides high fiber bundle amount for the trunk portion strength, while the outer layer provides reduced fiber bundle amount for the small diameter end portion, matching the actual strength requirements of each region.
Solution Approach 2:
The invention adds a dimensional approach by organizing fiber bundles in multiple concentric layers rather than uniform distribution. The inner layer and outer layer are arranged concentrically around the tank axis, allowing independent optimization of fiber bundle amounts at different radial positions and axial locations.
3Reliability
If the fiber bundle layer is made with sufficient fiber bundle amount throughout, then the structural integrity is ensured, but the material usage efficiency decreases
Solution Approach 1:
The fiber bundle layer is designed with local quality differences where the inner layer has higher fiber bundle amount for structural integrity in critical areas, while the outer layer has lower fiber bundle amount for material efficiency in less critical areas like the small diameter end portion.
Solution Approach 2:
The invention creates a composite fiber bundle layer structure combining an inner layer and an outer layer with different fiber bundle characteristics. This composite structure allows the tank to achieve both structural integrity and material usage efficiency by utilizing the appropriate fiber bundle density in each region.
Data Source
AI summary
To provide a tank capable of reducing a fiber bundle amount while ensuring strength. A tank having a tank body portion capable of filling a gas therein, the tank body portion comprising: a liner having a hollow cylindrical shape; and a fiber bundle layer covering an outer surface of the liner, wherein the fiber bundle layer has an inner layer, an outer layer, and an intermediate layer disposed between the inner layer and the outer layer, the end portion of the intermediate layer being located axially inwardly than the end portion of the fiber bundle layer.