Elastic Constants of a Tungsten-Particle Copper-Matrix Composite

• LEDBETTER Hassel

• DATTA Subhendu

抄録

Using a megahertz-frequency ultrasonic method, we measured the elastic constants of a composite consisting of seventy-volume-percent tungsten particles in a copper matrix. We report the Young, shear, and bulk moduli, and the Poisson ratio. Tungsten is much stiffer than copper: the Young-modulus ratio equals 410/129 = 3.2. Thus, from a linear rule-of-mixture, we expected large departures, which we found.(The Poisson ratio comes close to a linear rule-of-mixture.) Unexpectedly, we found a substantial elastic anisotropy: eighteen percent in the shear modulus. To model the system, we used a scattered-plane-wave ensemble-average approach. For the four elastic constants listed above, we found reasonable model-measurement agreement, one-to-seven percent for the averaged-over-direction measurements. Assuming oblate-spheroidal (c/a = 0.5) particles improves the agreement: two percent or less for the four cases.

収録刊行物

• JSME international journal. Ser. 1, Solid mechanics, strength of materials

  JSME international journal. Ser. 1, Solid mechanics, strength of materials 34 (2), 194-197, 1991

  一般社団法人 日本機械学会

キーワード

• elastic constants
• particle-reinforced composite
• scattered-plane-wave model
• sound velocities
• tungsten-copper composite

詳細情報

• CRID: 1390001205431647872
• NII論文ID: 110002348004
• NII書誌ID: AA10680585
• DOI: 10.1299/jsmea1988.34.2_194
• ISSN: 09148809
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1988/34/2/34_2_194/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
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