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Entire Life Time Monitoring of Filament Wound Composite Cylinders Using Bragg Grating Sensors: I. Adapted Tooling and Instrumented Specimen ArchiMer
Hernandez-moreno, H.; Collombet, F.; Douchin, B.; Choqueuse, Dominique; Davies, Peter; Gonzalez Velazquez, J. L..
This paper is the first of three describing the monitoring of filament wound cylinders using Bragg grating sensors. Part I describes the technological issues and the development of specimens instrumented with embedded gratings and thermocouples. The aim is to monitor the temperature and strain changes during cylinder manufacture (see Part II) and in-service behaviour (see Part III). Specimens are filament wound glass reinforced epoxy composites, so two technological problems have to be solved: one is to collect data during fabrication and the second is to remove the specimen from the mandrel without damaging the sensors. These were accomplished by design of a specially adapted split mandrel and a rotating interface between the filament winding machine and...
Tipo: Text Palavras-chave: Filament winding; Non destructive testing; Residual/internal stress; Polymer matrix composites (PMCs).
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-7330.pdf
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Entire Life Time Monitoring of Filament Wound Composite Cylinders Using Bragg Grating Sensors: II. Process Monitoring ArchiMer
Hernandez-moreno, H.; Collombet, F.; Douchin, B.; Choqueuse, Dominique; Davies, Peter; Gonzalez Velazquez, J. L..
This article is the second of a series of three papers concerning monitoring of filament wound cylinders using Bragg gratings. In this second part, the tooling presented in Part I is used to embed gratings and thermocouples in filament wound glass reinforced epoxy composite cylinders during fabrication. Bragg grating strain was obtained from wavelength and temperature response, by a calibration technique described here. Results from tests on five cylinders show the Bragg grating's capability to monitor strain evolution during fabrication, and the capacity to detect several phenomena occurring during cure is established, in addition to quantifying the initial material condition of the cylinder before it enters service.
Tipo: Text Palavras-chave: Filament winding; Non destructive testing; Residual stress; Smart materials.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-7329.pdf
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