Measurement of Three-Dimensional Anisotropic Thermal Diffusivities for Carbon Fiber-Reinforced Plastics Using Lock-In Thermography

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• 作者：Takuya Ishizaki ; Hosei Nagano
• 关键词：Anisotropy ; Carbon fiber ; reinforced plastics ; High thermal conductivity ; Thermal diffusivity
• 刊名：International Journal of Thermophysics
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：36
• 期：10-11
• 页码：2577-2589
• 全文大小：1,724 KB
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• 作者单位：Takuya Ishizaki (1)
  Hosei Nagano (1)
  
  1. Department of Aerospace Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8603, Japan
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Mechanics
  Industrial Chemistry and Chemical Engineering
  Physical Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1572-9567

文摘

A new measurement technique to measure the in-plane thermal diffusivity, the distribution of in-plane anisotropy, and the out-of-plane thermal diffusivity has been developed to evaluate the thermal conductivity of anisotropic materials such as carbon fiber-reinforced plastics (CFRPs). The measurements were conducted by using a laser-spot-periodic-heating method. The temperature of the sample is detected by using lock-in thermography. Thermography can analyze the phase difference between the periodic heat input and the temperature response of the sample. Two kinds of samples, unidirectional (UD) and cross-ply (CP) pitch-based CFRPs, were fabricated and tested in an atmospheric condition. All carbon fibers of the UD sample run in one direction [\(90^{\circ }\)]. The carbon fibers of the CP sample run in two directions [\(0^{\circ }/90^{\circ }\)]. It is found that, by using lock-in thermography, it is able to visualize the thermal anisotropy and calculate the angular dependence of the in-plane thermal diffusivity of the CFRPs. The out-of-plane thermal diffusivity of CFRPs was also measured by analyzing the frequency dependence of the phase difference.