| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Fernando, Gerard
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2023Effects of NaOH treatment and NaOH treatment conditions on the mechanical properties of coir fibres for use in composites manufacturecitations
- 2023Simultaneous multi-measurand analyses of cross-linking reactions within a differential scanning calorimeter using optical fibre sensorscitations
- 2023Single-Solvent Fractionation and Electro-Spinning Neat Softwood Kraft Lignincitations
- 2022Monitoring Cross-Linking, the Evolution of Refractive Index and the Glass Transition Temperature of an Epoxy Resin Using an Optical Fiber Sensorcitations
- 2021Vertically-aligned short E-glass fibre core sandwich composite: Production and evaluationcitations
- 2021Improved procedure for electro-spinning and carbonisation of neat solvent-fractionated softwood Kraft lignincitations
- 2016Monitoring pre-stressed composites using optical fibre sensorscitations
- 2016In-situ monitoring of cross-linking reactions using E-glass fibres and evanescent wave spectroscopycitations
- 2014Multi-point monitoring of cross-linking reactionscitations
- 2012Lateral spreading of a fiber bundle via mechanical meanscitations
- 2011Synthesis of Ag/AgCl-mesoporous silica nanocomposites using a simple aqueous solution-based chemical method and a study of their antibacterial activity on E. colicitations
- 2010Evaluation of Embedded Optical Fiber Composites: EFPI Sensor Response to Sensors in Fatigue Loadingcitations
- 2009In-situ damage detection using self-sensing compositescitations
- 2009Evaluation of embedded optical fiber sensors in composites: EFPI sensor fabrication and quasi-static evaluationcitations
- 2009A comparison of cure monitoring techniquescitations
- 2008A novel fibre optic acoustic emission sensorcitations
- 2008Chemical process monitoring and the detection of moisture ingress in composites - art. no. 69330R
- 2007Smart materials and systems
- 2007Fabrication of intrinsic fibre Fabry–Perot sensors in silica fibres using hydrofluoric acid etchingcitations
- 2006Process monitoring of fibre reinforced composites using optical fibre sensorscitations
- 2006Investigation of reversible photo-mechanical properties of azobenzene-based polymer films by nano-indentationcitations
- 2002A Method To Measure The Interfacial Shear Stress For Optical Fibres Embedded In Fibre Reinforced Composites
Places of action
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article
Monitoring pre-stressed composites using optical fibre sensors
Abstract
<p>Residual stresses in fibre reinforced composites can give rise to a number of undesired effects such as loss of dimensional stability and premature fracture. Hence, there is significant merit in developing processing techniques to mitigate the development of residual stresses. However, tracking and quantifying the development of these fabrication-induced stresses in real-time using conventional non-destructive techniques is not straightforward. This article reports on the design and evaluation of a technique for manufacturing pre-stressed composite panels from unidirectional E-glass/epoxy prepregs. Here, the magnitude of the applied pre-stress was monitored using an integrated load-cell. The pre-stressing rig was based on a flat-bed design which enabled autoclave-based processing. A method was developed to end-tab the laminated prepregs prior to pre-stressing. The development of process-induced residual strain was monitored in-situ using embedded optical fibre sensors. Surface-mounted electrical resistance strain gauges were used to measure the strain when the composite was unloaded from the pre-stressing rig at room temperature. Four pre-stress levels were applied prior to processing the laminated preforms in an autoclave. The results showed that the application of a pre-stress of 108 MPa to a unidirectional [0]<sub>16</sub> E-glass/913 epoxy preform, reduced the residual strain in the composite from –600 με (conventional processing without pre-stress) to approximately zero. A good correlation was observed between the data obtained from the surface-mounted electrical resistance strain gauge and the embedded optical fibre sensors. In addition to “neutralising” the residual stresses, superior axial orientation of the reinforcement can be obtained from pre-stressed composites. A subsequent publication will highlight the consequences of pres-stressing on fibre alignment, the tensile, flexural, compressive and fatigue performance of unidirectional E-glass composites.</p>