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Proceedings Paper

Strain monitoring of composite pressure vessel with thin metal liner using fiber Bragg grating
Author(s): Jun-qing Zhao; Rong-guo Wang; Xiao-dong He; Wen-bo Liu
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Paper Abstract

Composite pressure vessel with thin metal liner has the advantage of both composite and metal. Due to the difference of elastic strain limits of composite and metal, there is problem of the compatibility of deformation. Nine fiber Bragg gratings were bonded to the surface of longitudinal and hoop directions of pressure vessel to monitor the strain status during 4.5MPa service pressure condition. The measured strain by the Bragg sensor is perfectly linear with the applied force. However, the hoop strain decreased as loading process and increased as unloading process, it is also negative value on middle part of the dome. The phenomena had been discussed in this investigation. As a smart structure Bragg sensor can detect the real strain state of composite pressure vessel and is suitable for damage monitoring in service. Analyzing result shows the pressure vessel can work safely with the applied hydrostatic pressure.

Paper Details

Date Published: 21 October 2009
PDF: 6 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74930F (21 October 2009); doi: 10.1117/12.840654
Show Author Affiliations
Jun-qing Zhao, Harbin Institute of Technology (China)
Rong-guo Wang, Harbin Institute of Technology (China)
Xiao-dong He, Harbin Institute of Technology (China)
Wen-bo Liu, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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