Phase-field simulations of crack propagation in brittle polycrystal

Kento Oshima, Tomohiro Takaki, Mayu Muramatsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The properties of brittle materials such as ceramics are closely related to microcracks and their propagation in the microstructure. In this study, we constructed a simulation model to evaluate microcrack propagation in brittle polycrystalline materials. We used the phasefield crack model to represent crack propagation and the multi-phase-field model to represent the polycrystalline structure. To evaluate the basic characteristics of this model, we examined the driving force term and the threshold value of elastic strain energy for crack propagation. The validity of this model was confirmed by comparing the driving force term with that of another model having a different energy density function. The threshold value was determined by comparing the simulation and theoretical values of the start time of crack propagation. Furthermore, we evaluated the crack propagation path in a bicrystal and a polycrystal. a computational domain for a declined straight grain boundary. As a result, the transgranular and intergranular crack propagation could be reproduced depending on the amount of grain boundary inclination.

Original languageEnglish
Title of host publicationECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
Pages9085-9095
Number of pages11
Publication statusPublished - 2012 Dec 1
Externally publishedYes
Event6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012 - Vienna, Austria
Duration: 2012 Sep 102012 Sep 14

Publication series

NameECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers

Other

Other6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012
CountryAustria
CityVienna
Period12/9/1012/9/14

Keywords

  • Brittle polycrystal
  • Crack propagation
  • Phase-field method

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Applied Mathematics

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  • Cite this

    Oshima, K., Takaki, T., & Muramatsu, M. (2012). Phase-field simulations of crack propagation in brittle polycrystal. In ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers (pp. 9085-9095). (ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers).