Validation of Selected Optical Methods for Assessing Polyethylene (PE) Liners Used in High Pressure Vessels for Hydrogen Storage
Open Access
- 18 June 2021
- journal article
- research article
- Published by MDPI AG in Applied Sciences
- Vol. 11 (12), 5667
- https://doi.org/10.3390/app11125667
Abstract
A polyethylene (PE) liner is the basic element in high-pressure type 4 composite vessels designed for hydrogen or compressed natural gas (CNG) storage systems. Liner defects may result in the elimination of the whole vessel from use, which is very expensive, both at the manufacturing and exploitation stage. The goal is, therefore, the development of efficient non-destructive testing (NDT) methods to test a liner immediately after its manufacturing, before applying a composite reinforcement. It should be noted that the current regulations, codes and standards (RC&S) do not specify liner testing methods after manufacturing. It was considered especially important to find a way of locating and assessing the size of air bubbles and inclusions, and the field of deformations in liner walls. It was also expected that these methods would be easily applicable to mass-produced liners. The paper proposes the use of three optical methods, namely, visual inspection, digital image correlation (DIC), and optical fiber sensing based on Bragg gratings (FBG). Deformation measurements are validated with finite element analysis (FEA). The tested object was a prototype of a hydrogen liner for high-pressure storage (700 bar). The mentioned optical methods were used to identify defects and measure deformations.Keywords
Funding Information
- Narodowa Agencja Wymiany Akademickiej (PPN/BIL/2018/1/00058)
This publication has 27 references indexed in Scilit:
- Hydrogen storage: Recent improvements and industrial perspectivesInternational Journal of Hydrogen Energy, 2017
- Analysis, compensation, and correction of temperature effects on FBG strain sensorsPublished by SPIE-Intl Soc Optical Eng ,2013
- Hydrogen entry and absorption in ZrO 2 coated iron studied by electrochemical permeation and desorption techniquesInternational Journal of Hydrogen Energy, 2012
- Recent Progress in Digital Image CorrelationExperimental Mechanics, 2010
- 3-D computer vision in experimental mechanicsOptics and Lasers in Engineering, 2009
- Transport properties of gas mixtures through polyethylenePlastics, Rubber and Composites, 2007
- Damage evaluation and analysis of composite pressure vessels using fiber Bragg gratings to determine structural healthPublished by SPIE-Intl Soc Optical Eng ,2005
- Strain monitoring of a filament wound composite tank using fiber Bragg grating sensorsSmart Materials and Structures, 2002
- Embedded fiber optic sensor arrays for structural health monitoring of filament wound composite pressure vesselsPublished by SPIE-Intl Soc Optical Eng ,1999
- Original formulation of the finite element methodFinite Elements in Analysis and Design, 1990