Mechanism of Plastic Flow of Gaskets and Anvils in 6-8 Type Anvils.

• Yoshimoto J.

  National Institute for Research in Inorganic Materials

書誌事項

タイトル別名

• Mechanism of Plastic Flow of Gaskets an

抄録

In the 6-8 type anvils, the occurrences of blow-out have restricted the attainable pressure to 25 GPa. The cause of blow-out was attributed to the fracture of the cube of the second stage anvils maade made of cemented tungsten carbide (WC). The stress state in the cube was, therefore, calculated by a finite element method. As a result, there was a fracture line in the stress diagram of σ₀ vs σ_m that was expressed as σ₀=S₀- (3/2) σ_m, where σ₀, σ_m, and S₀ were the equivalent stress of von Mises, the mean normal stress, and half of the compressible strength, respectively. Furthermore, the breakage of pyrophyllite was also proven to follow the same fracture line except for the value of S₀. In Bridgman, anvils the expression of failure stress which derived from our flow model on the basis of the fracture line, accounted for the compressible strength of the various thicknesses of gaskets. The observed plastic deformation of the cube of the second stage anvils would already occur at lower pressures when the σ₀ exceeded the parallel fracture line, where the S₀ was less than the value at failure.

収録刊行物

• 高圧力の科学と技術

  高圧力の科学と技術 7 1514-1516, 1998

  日本高圧力学会

キーワード

• 6-8 type anvils
• pressure generation
• yield criterion
• gasket flow
• plastic deformation

詳細情報

• CRID: 1390001204380606464
• NII論文ID: 10002694536
• NII書誌ID: AN10452913
• DOI: 10.4131/jshpreview.7.1514
• ISSN: 13481940
• ISSN: 0917639X
• NDL書誌ID: 4494284
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4494284
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可