Structural strength prediction for porous titanium based on micro-stress concentration by micro-CT image-based multiscale simulation

Naoki Takano, Ken Fukasawa, Kazuaki Nishiyabu

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

For the design of porous titanium component, differently from its use as functional materials, structural strength prediction algorithm is proposed based on the micro-stress concentration analyzed by the multiscale simulation. The modeling of real microstructure is carried out by the image-based technique with X-ray micro-CT. The multiscale computational method consists of asymptotic homogenization and finite element mesh superposition (FEMS) techniques. A criterion is proposed to predict the nonlinearity initiation point in the load and displacement curve by means of micro-stress distribution expressed by histogram. Only the constituent's yield strength is referred regardless of the microscopic morphology. The originality of this paper lies in the validation of the homogenization process, the modeling guideline of micro-mesh superposition onto macro-mesh in FEMS, and the strength prediction algorithm. L-shaped components with different pore diameter were discussed in both experiment and simulation.

Original languageEnglish
Pages (from-to)229-235
Number of pages7
JournalInternational Journal of Mechanical Sciences
Volume52
Issue number2
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Finite element mesh superposition method
  • Microstructure
  • Multiscale simulation
  • Porous titanium component
  • Strength

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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