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An Interlaminar Strain Measurement for Insulation Panels of LNG Carriers
Author(s) -
Kim M. H.,
Kim D. H.,
Kang S. W.,
Lee J. M.
Publication year - 2006
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.2006.00261.x
Subject(s) - liquefied natural gas , structural health monitoring , materials science , structural engineering , strain (injury) , composite material , engineering , natural gas , waste management , medicine
The aim of the study was to investigate the dynamic failure initiation as well as the failure modes of insulation panels of liquefied natural gas (LNG) carriers. Insulation panels of LNG cargo tanks may include mechanical failures such as cracks as well as delaminations within the layers because of impact sloshing loads and fatigue loadings, and these failures cause a significant decrease of the structural safety. In this study, a structural health monitoring system was developed that employs fibre optic sensors for monitoring various failures that can occur in LNG insulation panels. Fibre optic sensors have the advantage of being embedded inside the insulation panels. The measurement signal of embedded fibre optic sensor is used to calculate the strain distribution within insulation panels and is analysed to identify the damage initiation. It has been observed that the presence of defects and delaminations produce noticeable changes in the strain measurement in a predictable manner. In addition, fibre optic sensors are used to measure static and dynamic strain variations with and without damage. It is expected that this study will be used as a fundamental study for the safety assessment of LNG insulation panels.