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Thermal Stress Analysis of Functuonally Graded Ceramic/Metal Composites(II)

경사기능성 세라믹/금속 복합재료의 열응력해석

  • Lim, Jae-Kyoo (Dept.of Mechanical Engineering, Chonbuk National University) ;
  • Song, Jun-Hee (Dept.of Mechanical Engineering, Chonbuk National University)
  • Published : 1997.10.01

Abstract

The development of a new material which should be continuously use under severe environment of very high temperature has been urgently requested. For the development of such super-heat resistant materials, the main problem is not only to make the superior thermal barrier properties but also to actively release thermal stress. So, a new concept of functionally graded material(FGM) has been proposed to overcome this problem. A composition and microstructure of FGM are varied continuously from place to place in ways designed to provide it with the maximum function of mitigating the induced thermal stress. So, FGM can be applied in the aerospace, the electronic and the medical field, etc.. In this study, thermal stress analysis of sintering PSZ/NiCrAlY graded material was conducted theoretically using a finite-element program. The temperature condition was sintering temperature assuming a cooling-down process up to room temperature. Fracture damage mechanism was anlayzed by the parameters of residual stress. It could be known that FGM provided with the function of mitigating the induced thermal stress.

Keywords

Functionally Graded Material;Thermal Stress Analysis;Sintering;Residual Stress;Axial Stress;Radial Stress;Hoop Stress;Shear Stress

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