Pressure Tank Filament Winding Gradient Angles
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Solution Overview
Problem
Current high-pressure gas storage tanks face inefficiencies in mass optimization, rupture mode, and manufacturing complexity, with insufficient burst pressure and gas-to-tank mass ratios, and lengthy, costly manufacturing processes.
Innovation Solution
A tank design featuring a specific filament winding pattern with varying fiber angles and layer configurations to minimize fiber quantity while maximizing stress distribution and mechanical reinforcement, ensuring a single-piece rupture mode and optimized mass ratio, combined with a manufacturing process that adheres to a precise sequence of layer deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional filament winding with fixed angles (50-58°) is used, then mechanical resistance is improved, but fiber quantity increases and mass optimization deteriorates
Solution Approach 1:
The patent applies parameter changes by varying the filament winding angle across different layers rather than using a fixed angle. The angle progresses from 50-58° in inner layers to 70-80° in outer layers, optimizing both mechanical resistance and mass efficiency. This gradient approach allows each layer to contribute optimally to stress distribution while minimizing total fiber quantity.
Solution Approach 2:
The patent implements local quality by assigning different winding angles to different radial positions (layers) of the tank wall. Inner layers use angles better suited for containing internal pressure, while outer layers use steeper angles for structural stability and rupture mode control. This localized optimization ensures each region of the tank wall has the precise fiber orientation needed for its specific mechanical demands.
2Reliability
If multiple filament winding layers are deposited to ensure healthy rupture mode, then rupture safety is improved, but manufacturing time and cost increase
Solution Approach 1:
The patent applies preliminary action by pre-planning the exact sequence and angles of filament winding layers before manufacturing. The gradient angle design (50-58° to 70-80° progression) is predetermined to achieve healthy rupture mode from the outset, eliminating the need for extensive post-manufacturing adjustments or iterative testing. This pre-engineered approach ensures rupture safety is built-in during the winding process itself.
Solution Approach 2:
The patent uses partial action by implementing just enough filament layers with gradient angles to achieve the required rupture safety, rather than uniformly over-winding all layers. The specific angle progression (50-58° inner layers, 70-80° outer layers) provides the minimum necessary reinforcement for healthy rupture mode while avoiding excessive fiber deposition, thus reducing manufacturing time and cost.
3Weight of moving object
If fiber angle is increased to reduce fiber quantity, then mass ratio is improved, but stress distribution and mechanical reinforcement deteriorate
Solution Approach 1:
The patent applies parameter changes by implementing a gradient in fiber angles across layers rather than using a uniform angle. Inner layers use 50-58° angles for optimal stress distribution under internal pressure, while outer layers transition to 70-80° angles to reduce overall fiber quantity. This continuous parameter variation optimizes both stress distribution and mass efficiency simultaneously.
Solution Approach 2:
The patent implements local quality by assigning different fiber angles to different radial positions within the tank wall. The inner layers (closer to the pressure source) use angles optimized for stress containment (50-58°), while outer layers use steeper angles (70-80°) optimized for structural efficiency and mass reduction. This localized angle assignment ensures stress distribution is maintained where needed while minimizing fiber quantity overall.
Data Source
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AI summary
The invention relates to a tank for storing liquid or gaseous media under pressure and its manufacturing process. Such a tank ensures a safe rupture mode and an optimized ratio between the mass of stored gas and the mass of the tank, for a fixed operating pressure. The present tank finds applications in fields using pressurized storage tanks, such as automotive, aerospace, etc.