Composite Pressure Tank Damage Indicator via Embedded Color Bands
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Solution Overview
Problem
Traditional filament wrapped composite fuel tanks are difficult to inspect for damage, leading to costly and time-consuming processes, and inexperienced assessments may result in hazardous situations, as they are more susceptible to cuts and gashes, and current methods do not efficiently determine minor or major damage without removing the tank from service.
Innovation Solution
A composite fuel tank with color bands formed by winding filaments coated with color, positioned at specific depths, allowing for visual inspection to assess damage, where the color indicates the depth and extent of damage, aiding in determining whether the tank should be repaired or removed from service, using contrasting colors and potentially luminescent materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional inspection methods are used for composite tanks, then damage can be detected, but the process is costly and time-consuming
Solution Approach 1:
The color bands are pre-positioned at specific depths within the composite tank structure during manufacturing. This preliminary action enables immediate visual assessment of damage depth without requiring complex inspection procedures, thus reducing both time and cost while maintaining detection accuracy.
Solution Approach 2:
Different colored bands indicate different damage depths, providing immediate visual information about the extent of damage. This color-coding system eliminates the need for time-consuming measurements and complex assessment procedures, allowing quick determination of whether damage is minor or major.
2Weight of moving object
If composite tanks are used to reduce weight, then vehicle weight decreases, but the tanks become more susceptible to damage from cuts and gashes
Solution Approach 1:
The composite tank structure incorporates color bands at specific locations and depths to provide localized visual indicators of damage. This allows the tank to maintain its lightweight composite construction while adding targeted visual monitoring capabilities at critical locations where damage is most likely to occur.
Solution Approach 2:
The color bands provide immediate visual feedback about the depth and extent of damage when cuts or gashes occur. This feedback mechanism allows operators to quickly assess whether damage has penetrated critical depths, enabling timely decisions about tank safety without requiring complex inspection equipment.
3Productivity
If inexperienced customers assess tank damage, then inspection costs decrease, but hazardous situations may result
Solution Approach 1:
The color bands provide intuitive visual indicators that do not require specialized knowledge to interpret. Different colors clearly indicate different damage depths, allowing inexperienced users to accurately assess whether damage is minor (superficial) or major (penetrating critical depths), thereby maintaining both efficiency and reliability.
Solution Approach 2:
The tank itself provides the assessment information through the visible color bands, eliminating the need for external inspection equipment or expert evaluation. Users can directly assess damage by observing which color bands are visible, making the system self-explanatory and reliable even for inexperienced individuals.
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
Enables quick and accurate visual assessment of damage, reducing the need for costly inspections and ensuring safer operations by allowing for timely decision-making on tank usage or repair, aligning with regulatory standards like NGV-2 certification.
Implementation Method 1
a piezoelectric material, which generates an electrical charge in response to applied mechanical stress
Data Source
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AI summary
A composite fuel tank, formed by winding filaments or strips around a plastic liner and binding the material with a curable binder. Embedded within the wrapped material at predetermined depths from the surface which provides a color indication of the level of damage due to tears, gashes, cuts and the like. The color indicator is part of a visual inspection method to determine tank damage and the extent of repair necessary.