High-Pressure Tank Reinforcing Layer Winding Angle Optimization
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Solution Overview
Problem
Current high-pressure tank designs lack sufficient studies on improving durability by optimizing the positional relationship and fiber winding angles between helical and hoop layers in the reinforcing layer, leading to potential fiber winding collapse and reduced strength.
Innovation Solution
A high-pressure tank configuration with a reinforcing layer that includes a helical layer group and a large-angle layer, where the fiber winding angles are strategically varied to minimize shear stress and prevent fiber winding collapse, with the innermost and outermost layers having the largest and second-largest angles respectively, and intermediate layers having smaller angles, ensuring uniform physical properties and reduced stress generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fiber winding angle is increased in the helical layer to improve strength, then the tank can withstand higher pressure, but the shear stress between layers increases leading to fiber winding collapse
Solution Approach 1:
The patent applies local quality by differentiating the fiber winding angles in different layers of the reinforcing layer. The helical layer has a first fiber winding angle range (10° to 30°) while the hoop layer has a second fiber winding angle range (70° to 85°). This localized differentiation allows each layer to optimize for its specific function while maintaining overall structural integrity and preventing fiber winding collapse.
Solution Approach 2:
The patent employs asymmetry by creating an asymmetric structure between the helical layer and hoop layer through different fiber winding angles. The helical layer uses smaller angles (10°-30°) for axial strength while the hoop layer uses larger angles (70°-85°) for circumferential strength. This asymmetric configuration optimizes the tank's pressure resistance while minimizing shear stress at the interface.
2Stability of the object's composition
If the fiber winding angle difference between adjacent layers is large to provide structural stability, then the layers maintain their positions, but shear stress increases causing fiber winding collapse
Solution Approach 1:
The patent applies parameter changes by precisely controlling the fiber winding angles within specific ranges: the helical layer uses 10° to 30° and the hoop layer uses 70° to 85°. By optimizing these angular parameters, the patent achieves the necessary layer position stability while minimizing shear stress that would cause fiber winding collapse.
3Strength
If the fiber winding angle is optimized for pressure resistance, then the tank strength improves, but the manufacturing complexity increases due to precise angle control requirements
Solution Approach 1:
The patent applies parameter changes by defining specific fiber winding angle ranges (helical layer: 10°-30°, hoop layer: 70°-85°) that optimize pressure resistance. These parameter specifications provide clear manufacturing guidelines that balance performance requirements with manufacturing feasibility, reducing the complexity of precise angle control while maintaining optimal strength.
Data Source
AI summary
A high-pressure tank includes a liner for storing a fluid, and a reinforcing layer covering an outer surface of the liner and including a fiber wound around the liner and a resin. The reinforcing layer includes a helical layer group including laminated helical layers, and a large-angle layer provided adjacent to the helical layer group and on the liner-side. The helical layer group includes an innermost layer that is closest to the liner and that is one of first and second helical layers respectively having the largest and second largest fiber winding angles, an outermost layer that is closest to an outer surface of the high-pressure tank and that is the other one of the first and second helical layers, and an intermediate layer disposed between the innermost and outermost layers and including a helical layer that is smaller in winding angle than the innermost and outermost layers.