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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Using OBR for pressure monitoring and BVID detection in type IV composite overwrapped pressure vessels

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Souza, G. [1] ; Tarpani, J. R. [1]
Total Authors: 2
[1] Univ Sao Paulo SMM EESC USP, Dept Mat Engn, Engn Sch Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Review article
Web of Science Citations: 0

Type IV COPVs (Composite Overwrapped Pressure Vessels) are among the most suited structures for hydrogen storage. However, its complex modes of failure and requirement for periodic maintenance has led the industry to apply high safety factors on designs. This is one of the challenges inhibiting the widespread usage of the H(2)in commercial vehicles. Structural health monitoring based on optical fibers is an emerging technology that can overcome these problems, as a neural network of sensors can be integrated to the structure during manufacturing and is readily accessible over the vessel lifetime. This gives information about the real structure condition, reducing overall maintenance costs. Here, core optical fibers were embedded in type IV COPVs during the manufacturing process and monitored with OBR (Optical Backscatter Reflectometer). Sensors were interrogated during an impact detection test and a pressurization test until burst failure. Fibers were capable of detecting the position and intensity of the damage in the first test and provided strain profiles over the entire length of the vessel for longitudinal and circumferential directions on the second. Optical microscopy of vessel sections showed matrix accumulation around the optical fiber as the main cause of sensor's failure. During pressurization, steep peaks of strain in the dome regions from the early measurements indicated the burst failure site. (AU)

FAPESP's process: 14/00099-0 - Manufacturing of composite laminates by vacuum infusion of liquid resin with optical fibers insertion for strain and damage sensing
Grantee:Gustavo de Souza
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 15/25554-4 - Manufacture of continuous fiber-reinforced polymer composite structures with embedded optical fibers for on-line health monitoring via optical backscatter reflectometry
Grantee:Gustavo de Souza
Support Opportunities: Scholarships abroad - Research Internship - Scientific Initiation