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Acta Mechanica Sinica

, Volume 16, Issue 3, pp 254–263 | Cite as

Finite element analysis on evolution process for damage microcrack healing

  • Huang Peizhen
  • Li Zhonghua
  • Sun Jun
Article

Abstract

Based on the thermal kinetic and mass conservation, a series of controlling equations for the finite element are derived and related programs are developed to simulate the damage microcrack healing process controlled by surface diffusion. Two kinds of typical models for microcrack splitting are proposed, i.e., the grain boundary energy existing on the crack surface and residual stresses applying on the crack surface. And the conditions of microcrack splitting in the two models are given as a function of the microcrack aspect ratio. The microcrack with traction-free surfaces will directly evolve into a spheroid.

Key Words

microcrack damage healing microcrack splitting and spheroidization surface diffusion finite element method 

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Copyright information

© Chinese Society of Theoretical and Applied Mechanics 2000

Authors and Affiliations

  • Huang Peizhen
    • 1
    • 2
  • Li Zhonghua
    • 2
  • Sun Jun
    • 3
  1. 1.School of Civil Engineering and MechanicsXi'an Jiaotong UniversityXi'anChina
  2. 2.School of Civil Engineering and MechanicsShanghai Jiaotong UniversityShanghaiChina
  3. 3.State Key Laboratory for Mechanical Behaviour of MaterialsXi'an Jiaotong UniversityXi'anChina

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