Health monitoring of marine composite structural joints using fibre optic sensors

Li, H.C.H.; Herszberg, Israel; Davis, Claire; Mouritz, A.P.; Galea, Steve C

doi:10.1016/j.compstruct.2006.04.054

Cited by 45 publications

(19 citation statements)

References 15 publications

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“…strains and vibrations) showed promise in the detection of damage, the authors stated that the assessment of this damage was ''far from trivial and will require considerable research effort.'' Building on this work, Li et al [14] implemented a HSHM system capable of both detecting and assessing damage within T-joints of GFRP ship hulls. In addition to embedded FBG sensors, a statistical outlier analysis of the resulting sensor data was implemented in order to distinguish states of damage within T-joints.…”

Section: Introductionmentioning

confidence: 98%

“…Indeed, until recently, the literature related to full-scale HSHM systems has primarily involved a system developed by the Norwegian Defense Research Establishment [16] 1 . Similar to [12,14,15], the primary components of the HSHM system are FBG sensors embedded within the composite hull. However, in addition to monitoring ''locations critical to the ship design,'' the sensor layout was constructed such that the structural health of the overall system could also be monitored.…”

Section: Introductionmentioning

confidence: 99%

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Model-based structural health monitoring of naval ship hulls

Stull

Earls

Koutsourelakis

2011

Computer Methods in Applied Mechanics and Engineering

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Model-based structural health monitoring of naval ship hulls

Stull

Earls

Koutsourelakis

2011

Computer Methods in Applied Mechanics and Engineering

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“…Composite materials can provide low-radar signatures for stealth operations. In addition, the low electro-magnetic signature these materials provide can reduce the possibility of detonating magnetic sea mines [3]. However, due to the special working conditions for military vessels, the composite materials may be subjected to some severe environments, such as mechanical shock loads, large temperature variations, and exposures [4].…”

Section: Introductionmentioning

confidence: 99%

Peridynamic Analysis of Marine Composites under Shock Loads by Considering Thermomechanical Coupling Effects

Gao

Oterkus

2018

JMSE

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Nowadays, composite materials have been increasingly used in marine structures because of their high performance properties. During their service time, they may be exposed to extreme loading conditions such as underwater explosions. Temperature changes induced by pure mechanical shock loadings cannot to be neglected especially when smart composite materials are employed for condition monitoring of critical systems in a marine structure. Considering this fact, both the thermal loading effect on deformation and the deformation effect on temperature need to be taken into consideration. Consequently, an analysis conducted in a fully coupled thermomechanical manner is necessary. Peridynamics is a newly proposed non-local theory which can predict failures without extra assumptions. Therefore, a fully coupled thermomechanical peridynamic model is developed for laminated composites materials. In this study, numerical analysis of a 13 ply laminated composite subjected to an underwater explosion is conducted by using the developed model. The pressure shocks generated by the underwater explosion are applied on the top surface of the laminate for uniform and non-uniform load distributions. The damage is predicted and compared with existing experimental results. The simulation results obtained from uncoupled case are also provided for comparison. Thus the coupling term effects on crack propagation paths are investigated. Furthermore, the corresponding temperature distributions are also investigated.

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“…The optical fiber Bragg grating (FBG) sensor has been widely applied to structural health monitoring applications due to several advantages over conventional sensors, such as a small physical size, insensitivity to electromagnetic interference, lightweight, capability of sensing at high temperature and environmentally-unfavorable conditions and multiplexing ability [9]. In order to employ FBG-type sensors for crack detection, one should mount these sensors on the structure in locations that are close to the damaged zones.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Model Updating for Sizing of Hole-Edge Crack Using Fiber Bragg Grating Sensors and the High-Order Extended Finite Element Method

Yang

Wang

et al. 2016

Sensors

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This paper presents a novel framework for probabilistic crack size quantification using fiber Bragg grating (FBG) sensors. The key idea is to use a high-order extended finite element method (XFEM) together with a transfer (T)-matrix method to analyze the reflection intensity spectra of FBG sensors, for various crack sizes. Compared with the standard FEM, the XFEM offers two superior capabilities: (i) a more accurate representation of fields in the vicinity of the crack tip singularity and (ii) alleviation of the need for costly re-meshing as the crack size changes. Apart from the classical four-term asymptotic enrichment functions in XFEM, we also propose to incorporate higher-order functions, aiming to further improve the accuracy of strain fields upon which the reflection intensity spectra are based. The wavelength of the reflection intensity spectra is extracted as a damage sensitive quantity, and a baseline model with five parameters is established to quantify its correlation with the crack size. In order to test the feasibility of the predictive model, we design FBG sensor-based experiments to detect fatigue crack growth in structures. Furthermore, a Bayesian method is proposed to update the parameters of the baseline model using only a few available experimental data points (wavelength versus crack size) measured by one of the FBG sensors and an optical microscope, respectively. Given the remaining data points of wavelengths, even measured by FBG sensors at different positions, the updated model is shown to give crack size predictions that match well with the experimental observations.

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Health monitoring of marine composite structural joints using fibre optic sensors

Cited by 45 publications

References 15 publications

Model-based structural health monitoring of naval ship hulls

Model-based structural health monitoring of naval ship hulls

Peridynamic Analysis of Marine Composites under Shock Loads by Considering Thermomechanical Coupling Effects

Probabilistic Model Updating for Sizing of Hole-Edge Crack Using Fiber Bragg Grating Sensors and the High-Order Extended Finite Element Method

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