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Autor

  • Schukar, Marcus (58)
  • Krebber, Katerina (38)
  • Witt, Jens (22)
  • Stajanca, Pavol (8)
  • Depré, A. (6)
  • Kinet, D. (6)
  • Steffen, Milan (6)
  • Munzke, Dorit (5)
  • Eisermann, René (4)
  • Grillet, A. (4)
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Erscheinungsjahr

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Dokumenttyp

  • Beitrag zu einem Tagungsband (33)
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Schlagworte

  • OTDR (8)
  • Structural health monitoring (6)
  • Distributed fiber optic sensing (5)
  • POF (5)
  • Strain sensor (5)
  • Atmungssensor (4)
  • Faseroptischer Sensor (4)
  • Fibre optic sensor (4)
  • Gamma radiation (4)
  • Optical backscatter reflectometry (4)
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Organisationseinheit der BAM

  • 8 Zerstörungsfreie Prüfung (18)
  • 8.6 Faseroptische Sensorik (18)
  • 3 Gefahrgutumschließungen (6)
  • 3.0 Abteilungsleitung und andere (4)
  • 5 Werkstofftechnik (2)
  • 5.3 Mechanik der Polymerwerkstoffe (2)
  • 3.2 Gefahrguttanks und Unfallmechanik (1)
  • 3.5 Sicherheit von Gasspeichern (1)
  • 7 Bauwerkssicherheit (1)
  • 7.5 Technische Eigenschaften von Polymerwerkstoffen (1)
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Development of adaptive composites with embedded plastic optic fibres (2010)
de Oliveira, Rui ; Schukar, Marcus ; Krebber, Katerina ; Michaud, V.
This study discusses the development of advanced composite materials with sensing capabilities obtained from the embedment of long period gratings in microstructured plastic optical fibres (mPOF-LPG). The mPOF-LPG was embedded in a carbon fibre reinforced polymer (CFRP) unidirectional laminate manufactured in autoclave. Processing steps were established in order to insure that mPOF does not suffer significant optical and structural degradation. The strain and temperature responses of the embedded mPOF-LPG were investigated.
Advanced composite materials with embedded POF sensors for structural health monitoring (2010)
de Oliveira, Rui ; Schukar, Marcus ; Krebber, Katerina ; Michaud, V.
A long period grating (LPG) mechanically imprinted in a microstructured polymer optical fibre (mPOF) is embedded in a carbon fibre reinforced polymer (CFRP) unidirectional laminate. Processing steps were established in order to ensure that mPOF does not suffer significant degradation. The strain and temperature responses of the embedded mPOF-LPG were then investigated.
Investigation of MPOF-LPGs for sensing applications (2009)
Steffen, Milan ; Schukar, Marcus ; Witt, Jens ; Krebber, Katerina ; Large, M. ; Argyros, A.
The versatility of MPOF offers a variety of sensing applications. In this paper the influence of strain, temperature and humidity is investigated. The results show that MPOF LPGs are well suited for strain sensing. Further investigations have to be made to clarify the behaviour on temperature and humidity in more detail.
Climatic investigations of microstructured polymer optical fibers (2009)
Schukar, Marcus ; Krebber, Katerina ; Large, M. ; Lwin, R.
The behaviour of optical transmission of microstructured polymer optical fibers (MPOFs) by varying temperature and humidity was investigated whereas different MPOFs with varying hole structures and manufacturing procedures were used.
Fiber optic sensors for high-temperature measurements on composite tanks in fire (2019)
Wosniok, Aleksander ; Skoczowsky, Danilo ; Schukar, Marcus ; Pötzsch, Sina ; Pötschke, Samuel ; Krüger, Simone
For the purpose of increasing payload and reduce freight cost, lightweight composite tank containers used for Transportation have been progressively developed during the last years. Compared to conventionally produced cylindrical steel tanks, the fiber-reinforced solutions allow greater flexibility in the tank design. Despite a number of further material-related benefits of fiber-reinforced composites as non-conductive and non-magnetic behavior as well as corrosion resistance and high strength, the optimization of their thermal degradation properties during combustion is still a challenge. To improve the fire performance of lightweight composite containers, special intumescent fire protection coatings can be applied onto the outside tank surface. This paper presents fire tests on glass-fiber-reinforced plastic transport tanks with complex geometries sheltered with different surface-applied fire protection systems. To evaluate the fire resistance of the tank structures, a fiber optic monitoring system was developed. This system is based on distributed temperature measurements using high-Resolution optical backscatter reflectometry and pointwise reference measurements using fiber Bragg gratings. Thereby, all the fiber optic sensors were directly integrated in the composite layer structure of the tanks. The focus of the presented work is on the demonstration of capability of fiber optic monitoring system in such high-temperature application. Moreover, the fiber optic measurements provide new insights into the efficiency of intumescent coating applied for fire protection of fiber-reinforced plastic transport tanks.
Response of microstructured plastic optical fiber Bragg grating to gamma radiation (2017)
Stajanca, Pavol ; Woyessa, G. ; Schukar, Marcus ; Bang, O. ; Krebber, Katerina
Response of PMMA-based plastic optical fiber Bragg grating (FBG) to gamma radiation is investigated for the first time. FBG wavelength shift as large as 150 pm is observed for irradiation to 18 kGy.
Climatic investigations of microstructured polymer optical fibers (2009)
Schukar, Marcus
- Behaviour of MPOF under climatic influences (e.g. temperature, humidity) is an important criterium for the use of MPOF as sensors or for communication - Different types of MPOF with varying hole structures were tested: I. Multimode MPOF (type 1) II. Graded index MPOF (type 2)
Gamma radiation induced effects in perfluorinated polymer optical fibers for sensing applications (2015)
Stajanca, Pavol ; Sporea, D. ; Mihai, L. ; Negut, D. ; Schukar, Marcus ; Krebber, Katerina
Radiation induced attenuation in perfluorinated polymer optical fiber was investigated as a potential mean for online. in situ gamma radiation monitoring. Spectral dependence of radiation induced attenuation was measured in the visible and near infrared range. Attenuation spectrum exhibits sharp increase both towards the ultraviolet and infrared side of the spectrum with 3 distinct peaks around 1400 nm. The fiber sensitivity to gamma radiation was further evaluated at two commonly used IR wavelengths (1310nm and l550nm} by pre- and post-irradiation optical time-domain reflectometry measurements. The examined fiber is sensitive up to lOO kGy of total absorbed dose with only minor saturation towards the large dose values. The influence of gamma radiation on the fiber mechanical properties was studied as well. Up to the maximal dose of 100 kGy, no significant deterioration of fiber strength and elasticity was observed.
Faser-Bragg-Gitter-Sensoren überwachen Strahlung am Elektronenspeicherring BESSY II. (2007)
Schukar, Marcus
Untersuchung der Eignung von FBG-Strahlungssensoren zur verteilten Überwachung auftretender ionisierender Strahlung an Elektronenspeicherringen. Test des Messverfahrens am Undulator U 49/1 des Elektronenspeicherrings BESSY II
Novel fibre optic temperature sensors based on thermoresponsive polymers (2015)
Schukar, Marcus ; Wischerhoff, E. ; Kalbitz, R.
In this paper we present the development of a novel of a fibre optic temperature sensor based on thermoresponsive polymers. The principle of our invention that is already applied for a patent is based on the detection of the optical power that is transmitted through an optical fibre, whilst a temperature sensitive element is integrated in this fibre.
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