Winding Divided Fiber Sheets for Uniform Tank Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tank production methods result in non-uniform stacked portions and potential distortion or local gaps in the sheet layer due to variations in tension and thickness of the fiber sheet, leading to surface wrinkles and compromised tank strength.
Innovation Solution
The method involves dividing the fiber sheet into shorter lengths and winding them in multiple steps, with an overlapped length satisfying the inequality X > (σ·t·L)/(A·W), ensuring uniform tension and sufficient shearing strength to prevent distortion and local gaps, thereby securing the tank's strength and preventing surface wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fiber sheet is continuously wound at once to form a sheet layer, then the winding process is efficient and simple, but non-uniform stacked portions such as distortion or local gaps may be generated due to tension fluctuations and thickness variations
Solution Approach 1:
The continuous fiber sheet is divided into multiple divided fiber sheets with shorter lengths. Each divided fiber sheet is wound separately in a divided winding step, allowing tension to be controlled and uniformized for each segment. This segmentation prevents the accumulation of tension variations that occur in continuous winding, thereby eliminating distortion and local gaps while maintaining production efficiency.
2Manufacturing precision
If the fiber sheet is divided into multiple shorter divided fiber sheets and wound in multiple steps, then uniform stacking is achieved, but the process complexity increases
Solution Approach 1:
The fiber sheet is segmented into divided fiber sheets that can be handled and wound independently. This segmentation allows each segment to be wound under controlled, uniform tension conditions, achieving uniform stacking. The process complexity is managed by systematically dividing the winding into multiple controlled steps rather than attempting to control a single continuous winding process.
Solution Approach 2:
The fiber sheet is pre-divided into multiple shorter segments before the winding process begins. This preliminary action allows each segment to be prepared with consistent properties and wound under optimized tension conditions, ensuring uniform stacking from the outset and reducing the need for complex real-time adjustments during winding.
3Manufacturing precision
If divided fiber sheets are wound with overlapping, then uniform stacking and distortion prevention are achieved, but the shearing strength at overlapped portions must be sufficient to maintain tank strength
Solution Approach 1:
The fiber sheet is divided into segments that are wound with controlled overlap. The overlap length is specifically designed to provide sufficient bonding area for the resin to develop adequate shearing strength. By segmenting the winding process and controlling the overlap parameters, both uniform stacking and structural strength requirements are satisfied simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the uniform stacking of divided fiber sheets, preventing distortion and local gaps, and ensuring the tank's strength by maintaining sufficient shearing strength at the overlapped portions, thus enhancing the tank's structural integrity and preventing surface wrinkles.
Implementation Method 1
heating and curing the resin so as to form a sheet layer
Implementation Method 2
the shearing strength of the resin that forms the sheet layer is indicated by A
Data Source
AI summary
A tank production method for preventing generation of non-uniform stacked portions in a sheet layer while securing the strength of the tank, the method including a winding step of winding resin-impregnated fiber sheets to form a sheet layer with a predetermined thickness. The winding step includes divided winding steps of winding divided fiber sheets obtained by dividing a fiber sheet into a plurality of divided fiber sheets having a length shorter than the length required to form the sheet layer with the predetermined thickness. The second divided winding step or each of the second and following divided winding step satisfies an Inequality: X>(σ·t·L)/(A·W), where an overlapped length of the start end of a new divided fiber sheet stacked on the terminal end of the divided fiber sheet wound in the preceding divided winding step is X, the tensile stress applied to the tank in the circumferential direction thereof is σ, the thickness and width of each divided fiber sheet are t and W, respectively, the length of a cylindrical portion of the tank is L, and the shearing strength of the resin is A.