Multifunctional Carbon Fiber Sensors: The Effect of Anisotropic Electrical Conductivity

Forintos, Norbert; Sarkadi, Tamás; Boros, Ö C; Czigány, Tibor

doi:10.1109/jsen.2021.3053125

Cited by 6 publications

(1 citation statement)

References 20 publications

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“…As mentioned above, the elastic strain (ε xx ) of the OA having a length dx in the direction x is defined as (6) Taking into consideration the lateral strains induced by the longitudinal strain: (7) In the context of the resistance of a conductor having a length L, a diameter D, and subjected to a longitudinal stress σ xx (generating strains ε xx , ε yy , and ε zz ), the resistance under stress R Stressed can be expressed as ( 8)…”

Section: B Electrical Resistance Changes Due To Strain and Temperaturementioning

confidence: 99%

A Test Rig for the Calibration of Strain Sensing Carbon Fibre

Durieux

Day

Vagapov

2022

2022 3rd International Conference on Communication, Computing and Industry 4.0 (C2I4)

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This paper presents the test equipment developed for the measurement and calibration of sensing carbon fibre. The testing device provides precise load application to a carbon fibre tow and measuring the microvariations of the fibre electrical resistance in a temperaturecontrolled environment. The measurement approach based on sensing carbon fibre is a method for strain measurement being recently developed and similar to the traditional strain gauge method. However, due to the integration of the sensing element into the material, it is considered the most promising alternative for carbon fibre reinforced plastic applications. The theory behind fibre strain measurement including the influence of the temperature on the fibre electrical resistance is presented. A detailed presentation of the measurement and calibration device is given including the measurement loop. The test rig is capable of testing fibres at a temperature up to 180°C and the maximum load applied to the fibre of 1500N. A 5-run test on a T300 3K carbon fibre at 100°C is provided as an example of the test rig operation. On average, the accuracy of the testing method over half load (700N) offers results having a maximum variation of 5% around the mean value of the whole set of test readings collected.

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Section: B Electrical Resistance Changes Due To Strain and Temperaturementioning

confidence: 99%