Details

Autor(en) / Beteiligte

• Bouyer, Baptiste
• Tardif, Xavier
• Mercader, Célia
• Delaunay, Didier

Titel

Design of a new device for fibers strand axial thermal conductivity measurement

Ist Teil von

• International journal of thermal sciences, 2021-03, Vol.161, p.106740, Article 106740

Ort / Verlag

Elsevier Masson SAS

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A device for fibers strand axial thermal conductivity measurement has been designed and modeled by finite elements and realized. The method is based on Fourier's law in steady state and is inspired by the widely spread guarded hot plate method. This device has been designed to measure thermal conductivity on a wide range from 0.1W/(m.K) to 100W/(m.K) which represent the range of thermal conductivity found in fibrous materials. The numerical study has shown that radiative heat losses can reach the same order of magnitude than the researched conductive heat flux if no care is taken but are minimized when the temperature difference applied on the sample is centered on the temperature of the wall of the vacuum chamber enclosing the device. Measurements of thermal conductivity have been realized on three samples of bulk materials representative of the measurement range and on commercially available carbon fibers strands T300. The results are in good agreement with the values found in the literature and validate this device. •Device for fiber thermal conductivity measurement designed by finite elements.•Study and set up of insulation solutions for radiative and convective heat losses.•Validation of the device for low to high thermal conductivity with known materials.•Good agreement between literature and measurements on carbon fibers T300 samples.•Fiber strands axial thermal conductivity measurement from precursor to carbon fiber.