Anisotropic elastic constants of porous copper with resonant ultrasound spectroscopy and micromechanics

Masakazu Tane, Tetsu Ichitsubo, Masahiko Hirao, Tomohiro Morishita, Hideo Nakajima

Research output: Contribution to journalArticlepeer-review


We have studied the anisotropic elastic constants of crept copper with the oblate ellipsoidal pores and lotus-type porous copper with long straight pores aligned unidirectionally. We used the combination of resonant ultrasound spectroscopy and electromagnetic acoustic resonance methods to determine all the independent elastic constants with high accuracy. The elastic anisotropy depends on porosity, pore shape, pore orientation, and matrix's texture. We have calculated the elastic constants by a micromechanics theory, assuming that the pores are ellipsoidal inclusions of zero elasticity. We have obtained good agreement between micromechanics calculations and measurements.

Original languageEnglish
Pages (from-to)1073-1077
Number of pages5
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Issue number11
Publication statusPublished - 2002 Nov
Externally publishedYes


  • Anisotropic elastic constants
  • Creep-damaged copper
  • Electromagnetic acoustic resonance
  • Lotus-type porous copper
  • Micromechanics
  • Resonant ultrasound spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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