Multi-scale analysis and microscopic stress evaluation for ceramics considering the random microstructures

Naoki Takano, Keiichi Kimura, Masaru Zako, Futoshi Kubo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A multi scale computational method using the homogenization method is applied to the stress analysis of ceramics considering the random and complex microstructure three-dimensionally. The main purpose of this paper is to propose a numerical method to understand quantitatively the microscopic stress distribution in the random microstructure especially for porous ceramics. The voxel mesh is used to model the microstructure automatically with the help of the image-based modeling technique. In the analysis of porous alumina with needle-like random pores, the distance from the nearest pore is measured for all the voxel elements, which is plotted with the histogram of the microscopic stress distribution. This is of great help to study the relation between the stress concentration and the pore geometry and dispersion.

Original languageEnglish
Pages (from-to)1046-1053
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume68
Issue number7
Publication statusPublished - 2002 Jul
Externally publishedYes

Fingerprint

Stress concentration
Microstructure
Homogenization method
Aluminum Oxide
Computational methods
Stress analysis
Needles
Numerical methods
Alumina
Geometry

Keywords

  • Ceramics
  • Computational Mechanics
  • Finite Element Method
  • Homogenization Method
  • Multi-Scale Analysis
  • Voxel Element

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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AU - Kimura, Keiichi

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AU - Kubo, Futoshi

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AB - A multi scale computational method using the homogenization method is applied to the stress analysis of ceramics considering the random and complex microstructure three-dimensionally. The main purpose of this paper is to propose a numerical method to understand quantitatively the microscopic stress distribution in the random microstructure especially for porous ceramics. The voxel mesh is used to model the microstructure automatically with the help of the image-based modeling technique. In the analysis of porous alumina with needle-like random pores, the distance from the nearest pore is measured for all the voxel elements, which is plotted with the histogram of the microscopic stress distribution. This is of great help to study the relation between the stress concentration and the pore geometry and dispersion.

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