Laser Assisted Electrical Contacting in Multifunctional GF/PP Composites

Schilling, Niels; Wiegand, Niclas; Klotzbach, Udo

doi:10.4028/www.scientific.net/msf.825-826.541

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…To realize a composite sample measurable at the margins of the test structure the GF‐sensors are modified before processing . As a supply line the remaining 90 mm of each end of the GF‐sensors are treated with a conductive silver paint Acheson Silver DAG 1415 (see Figure ).…”

Section: Methodsmentioning

confidence: 99%

A Comparative Study on the Textile Processing of Carbon and Multifunctional Glass Fiber Sensor Yarns for Structural Health Monitoring

et al. 2016

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In this comparative study two sensor yarns, such as carbon filament yarns and carbon nanotube coated glass filament yarns are analyzed regarding their electrical property changes during textile manufacturing into multi-layer weft knitted structures as well as during compression molding into a composite plate due to the different electro-mechanical behavior, various sensitivities, and changing ways of acting as an in-situ sensor: yarns act either as a conductive fiber itself (carbon) or as an electrical conductive sizing (CNT-coated glass). Both sensor yarns under investigation have to be considered differently with regard to changes in the electrical conductivity due to mechanical loading during textile processing and possible healing of cracks during compression molding.

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Section: Methodsmentioning

confidence: 99%

A Comparative Study on the Textile Processing of Carbon and Multifunctional Glass Fiber Sensor Yarns for Structural Health Monitoring

et al. 2016

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“…Depending on the position within the later test specimen, silver paint (Pelco Colloidal Silver Liquid, Ted Pella, Redding, USA) was applied to the sensor yarn. The silver paint reduces the contact resistance and therefore facilitates the electrical contacting for the resistance measurement during mechanical testing. Furthermore, the silver paint can be used to tailor the sensing areas along the length of the yarn by shortcutting the coating.…”

Section: Methodsmentioning

confidence: 99%

Multifunctional Interphases: Percolation Behavior, Interphase Modification, and Electro‐Mechanical Response of Carbon Nanotubes in Glass Fiber Polypropylene Composites

Wiegand

Mäder

2015

Adv Eng Mater

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Carbon nanotube dispersions have been immersedin a maleated polypropylene film former system andapplied to insulating glass filament yarns compatible to polypropylene matrix. The percolation threshold can be reached below 0.5 wt% carbon nanotubecontent. In order to achieve a homogeneous multifunctional interphase, the average sizing thickness must be above 450 nm tailored during a coating process by varying the solid content of the sizing. The temperature and the velocity of the coating process have a great impact on the volume resistivity of the multifunctional interphase. Electro-mechanical behavior as sensors in unidirectional composites containing 50 vol% glass fiber reinforcement is monitored during tensile and compression loading. The largest electrical sensitivity is achieved for tensile loading in the axis of fibers.

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“…Interphases in fiber-reinforced composites are vital regions for the stress transfer between fibers and matrices [7][8][9][10]. Implementing a percolated carbon nanotube (CNT) network into composite interphases allows the detection of mechanical stress-strain behavior by monitoring electrical response [3][4][5][11][12][13][14][15][16][17] and contributes to additional effects besides silane coupling agents and polymeric film formers. The change in electrical resistance gives a quantitative parameter for the deformation as well as the early stage damage formation in highly strained regions of the interphase [5], as shown in our previous work with online commingled yarns.…”

Section: Introductionmentioning

confidence: 99%

Commingled Yarn Spinning for Thermoplastic/Glass Fiber Composites

Wiegand

Mäder

2017

Fibers

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Online commingled yarns were spun with three different polymeric matrices, namely polypropylene (PP), polyamide (PA) and polylactic acid (PLA) and glass fibers. Tailored sizings were applied for the three matrices and the resulting mechanical performance of unidirectional composites was evaluated and compared. Significant improvements in the fiber/matrix bonding were achieved by employed sizing chemistry in order to achieve multifunctional interphases. The pure silane coupling agents provide the best performance for all matrices investigated. However, an additional film former has to be added in order to achieve fiber processing. Film formers compatible to the matrices investigated were adapted. The consolidation behavior during isothermal molding was investigated for polypropylene matrix. Different fiber volume contents could be realized and the resulting mechanical properties were tested.

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Laser Assisted Electrical Contacting in Multifunctional GF/PP Composites

Cited by 3 publications

References 6 publications

A Comparative Study on the Textile Processing of Carbon and Multifunctional Glass Fiber Sensor Yarns for Structural Health Monitoring

A Comparative Study on the Textile Processing of Carbon and Multifunctional Glass Fiber Sensor Yarns for Structural Health Monitoring

Multifunctional Interphases: Percolation Behavior, Interphase Modification, and Electro‐Mechanical Response of Carbon Nanotubes in Glass Fiber Polypropylene Composites

Commingled Yarn Spinning for Thermoplastic/Glass Fiber Composites

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