Applicabilities of Equations of σm=ΨKicSmf1/2 and σd-1=σo-1+Ka1/2 to Soda Lime Glass

• Kawaguchi Yoshihiro

  Graduate Student in Course of Materials Science, The University of Tokyo

• Yanaba Yutaka

  Institute of Industrial Science, The University of Tokyo

• Hayashi Koji

  Institute of Industrial Science, The University of Tokyo

書誌事項

タイトル別名

• Applicabilities of Equations of .SIGMA.m=.PSI.KICSmf1/2 and .SIGMA.d-1=.SIGMA.o-1+Ka1/2 to Soda Lime Glass.
• Applicabilities of Equations of シグマ m KicSmf1 2 and シグマ d 1 シグマ o 1 Ka1 2 to Soda Lime Glass

抄録

We have already clarified that our derived equations of σm=ΨK_ICS_mf^1/2 as well as σ_d^-1=σ_o^-1+Ka^1/2 are applicable to various hard or brittle sintered materials such as WC-Co hardmetal and Si₃N₄ ceramics (σ_m: flexural strength, Ψ: shape factor, K_IC: fracture toughness, S_mf: total macroscopic fracture surface area of fragments, σ_d: external stress which operated on the fracture origin, σ_o: intrinsic or attainable fracture strength, K: material factor, a: half length of fracture origin). In this study, we investigated whether these two equations are applicable to soda lime glass which is non-crystalline and has extremely low K_IC. It was found that both equations are also applicable to soda lime glass, when S_mf+S_c is used in the application of the former equation, instead of S_mf (S_c: the total macroscopic fracture surface area of internally stopped cracks). The fracture started from a visible microstructural defect with sizes of 10-30μm even for polished test pieces with σ_m values of 180-78 MPa. A correction was made in the derivation process of the former equation: the equation itself, however, was not changed.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 47 (3), 273-281, 2000

  一般社団法人 粉体粉末冶金協会

キーワード

• fracture toughness
• fracture surface area
• flexural strength
• fracture origin
• glass
• stopped crack

詳細情報

• CRID: 1390001206308162944
• NII論文ID: 10005137322
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.47.273
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 5321008
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5321008
• 本文言語コード: en
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