Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Asymmetric Creep Behavior of Ceramics

세라믹의 비대칭 크리프 거동

  • Lim, H.J. (Research Institute of Industrial Science and Technology) ;
  • Jung, J.W. (Pohang University of Science and Technology) ;
  • Han, D.B. (Research Institute of Industrial Science and Technology) ;
  • Kim, K.T. (Dept. of Mechanical Engineering, Pohang University of Science and Technology)
  • 임희진 (포항공과대학교 대학원) ;
  • 정진원 (포항공과대학교 대학원) ;
  • 한동빈 (산업과학기술연구소) ;
  • 김기태 (포항공과대학교 기계공학과)
  • Published : 1996.10.01
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Abstract

Asymmetric creep behaviors of ceramics under high temperature were investigated. Based on the Norton's power-low creep equation, multidirectional creep equations were proposed for general geometric loading conditions. The proposed equations were implemented into finite element program (ABAQUS) to simulate creep behaviors of ceramics in complicated loading conditions. The calculated results were compared with experimental data for uniaxial compression of Si-SiC C-ring and flexure of Si-SiC and $Al_2O_3$ in the literature. The finite element results agreed well with experimental data when the principal stresses are smaller than the threshold stress for creep damage. A good agreement was also obtained for damage zone in Si-SiC bending creep specimen compared with experimental data.

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