Finite Element Analysis of Creep Crack Initiation in Functionally Graded Materials with Crack Parallel to the Gradient

Authors

  • Huan Sheng Lai Sun Yat-sen University, Zhuhai 519082, China
  • Chunmei Bai Sun Yat-sen University, Zhuhai 519082, China
  • Kang Lin Liu Fuzhou University, Fujian 350116, China

DOI:

https://doi.org/10.15377/2409-9821.2019.06.3

Keywords:

FGM, creep damage, creep crack initiation, functionally graded material.level.

Abstract

 With the advances in material synthesis technologies, functionally graded materials (FGMs) are developed to use in high temperature structurals due to the excellent high temperature mechanical properties. To facilitate wide use of FGMs in high temperature structures, finite element method (FEM) was used in this paper to investigate effects of creep resistant properties gradients on creep crack initiation (CCI) in FGMs, with crack parallel to the gradient. Results indicated that when creep resistant properties increased in the crack growth direction, CCI was retarded by creep properties gradients. However, CCI was accelerated by creep properties gradients when creep resistant properties decreased in the crack growth direction. CCI position occurred in the two symmetric slanted planes of the initial crack, regardless of the gradient variation of creep resistant properties.

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Author Biographies

  • Huan Sheng Lai, Sun Yat-sen University, Zhuhai 519082, China
    Sino-French Institute of Nuclear Engineering and Technology
  • Chunmei Bai, Sun Yat-sen University, Zhuhai 519082, China
    School of Civil Engineering
  • Kang Lin Liu, Fuzhou University, Fujian 350116, China
    School of Chemical Engineering

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Published

2019-10-18

Issue

Vol. 6 (2019)

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How to Cite

1.
Finite Element Analysis of Creep Crack Initiation in Functionally Graded Materials with Crack Parallel to the Gradient. Int. J. Archit. Eng. Technol. [Internet]. 2019 Oct. 18 [cited 2026 Feb. 12];6(1):17-23. Available from: https://www.avantipublishers.com/index.php/ijaet/article/view/801

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