Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Theoretical Study for the Thermal Diffusivity Measurement of Semi-Infinite Solid Using Photothermal Displacement Method

광열변위법을 이용한 반무한 고체의 열확산계수 결정에 대한 이론적 연구

  • 전필수 (아주대학교 대학원 기계공학과) ;
  • 이광재 (아주대학교 대학원 기계공학과) ;
  • 유재석 (아주대학교 기계 및 산업공학부) ;
  • 박영무 (아주대학교 기계 및 산업공학부) ;
  • 이종화 (아주대학교 기계 및 산업공학부)
  • Published : 2002.12.01
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Abstract

A complete theoretical treatment of the photothermal displacement technique has been performed for thermal diffusivity measurement in semi-infinite solid materials. The influence of the parameters, such as radius and modulation frequency of the heating beam and the thermal diffusivity, was studied. Usually, thermal diffusivity was determined by the deformation angle and phase angle as the relative position between the heating and probe beams. In this study, we proposed the simple analysis method based on the real part of deformation gradient as the relative position between two beams. It is independent in the parameters such as power of heating beam, absorption coefficient, reflectivity, Poisson's ratio, and thermal expansion coefficient.

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References

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