A study of thermal diffusivity of carbon-epoxy and glass-epoxy composites using the modified pulse method

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Abstract

Transient heat transfer is studied and compared in two planeparallel composite walls and one EPIDIAN 53 epoxy resin wall acting as a matrix for both composites. The first of the two walls is made of carbonepoxy composite; the other wall is made of glass-epoxy composite, both with comparable thickness of about 1 mm and the same number of carbon and glass fabric layers (four layers). The study was conducted for temperatures in the range of 20-120 °C. The results of the study of thermal diffusivity which characterizes the material as a heat conductor under transient conditions have a preliminary character. Three series of tests were conducted for each wall. Each series took about 24 h. The results from the three series were approximated using linear functions and were found between (0.7-1.35)×10−7m2/s. In the whole range of temperature variation, the thermal diffusivity values for carbon-epoxy composite are from 1.2 to 1.5 times higher than those for the other two materials with nearly the same thermal diffusivity characteristics.

[1] Godzimirski J.: Airline construction materials WAT, Warsaw 2008 (in Polish).

[2] Bates D., Smith G., Lu D., Hewitt J.: Rapid thermal non-destructive testing of aircraft components. Composites: Part B 31(2000), 175-185.

[3] www.airbus.com, www.aviationnews.eu, www.swiss-composite.ch, www.hexcel.com; www.netcomposites.com, www.porcher-ind.com.

[4] Taylor R.E., Magliˆc K.D.: III Thermal diffusivity measurement methods. In: Compendium of Thermophysical Property Measurement Method, (K.D. Magliˆc Ed.), Plenum Press, New York 1984, 299-452.

[5] Parker W.J., Jenkins R.J., Butler C.P., Abbot G.L.: Flash method of de- termining thermal diffusivity heat capacity and thermal conductivity. J. Appl. Phys., 32(1961), 1679-1684.

[6] Terpiłowski J.: A modified flash method for determination of thermal diffusivity in semitransparent solids exposed to laser radiation. Arch. Thermodyn. 25(2004), 2, 39-68, [7] Terpiłowski J., Szczepaniak R., Woroniak G., Rudzki R.: Adaptation of the modified pulse method for the determination of thermal diffusivity of solids in the vicinity of second-order phase transition points. Arch. Thermodyn. 34(2013), 2, 71-90.

[8] Terpiłowski J., Piotrowska-Woroniak J., Woroniak G.: Comparative in- vestigations of thermal diffusivity by classical and modified pulse methods exemplified by the iron. Part II. Ciepłownictwo OgrzewnictwoWentylacja 2007, 2, 15-19 (in Polish).

[9] The Temperature handbook 21st Century, 2nd Ed. OMEGA, Stanford 2000. www.omega.com

Archives of Thermodynamics

The Journal of Committee on Thermodynamics and Combustion of Polish Academy of Sciences

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CiteScore 2016: 0.54

SCImago Journal Rank (SJR) 2016: 0.319
Source Normalized Impact per Paper (SNIP) 2016: 0.598

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