Investigation of Thermal Fatigue : Behavior of Cracks during Thermal Fatigue

• KANAZAWA Kenji

• IWANAGA Shogo

• KUNIO Takeshi

• IWAMOTO Kanetoshi

• UEDA Teruyuki

抄録

In this paper, as an attempt at the quantitative representation of the behavior of fatigue cracks during thermal fatigue, the concept of "crack density"is proposed. This can be defined by n^^-=1/(2πr)∫^2πr₀ nds where n denotes the number of cracks intersecting a meridian line drawn on the surface of specimen, and r indicates the radius of cylindrical specimen. Experiments were carried out in two different temperature ranges ; 200∼600°C and 300∼700°C. The values of crack density on the surface of a specimen, after a certain number of repetitions of thermal load before failure, were measured by optical microscope. Then relations between the values of crack density and crack depth were investigated. The behavior of cracks at a certain stage is discussed also. It was found that the crack density n^^- is one of the appropriate parameters to represent the damaged state of specimen.

収録刊行物

• Bulletin of JSME

  Bulletin of JSME 11 (47), 785-790, 1968

  一般社団法人 日本機械学会

キーワード

• General Engineering

詳細情報

• CRID: 1390001206492222976
• NII論文ID: 110002361265
• NII書誌ID: AA0058509X
• DOI: 10.1299/jsme1958.11.785
• ISSN: 18811426
• ISSN: 00213764
• Web Site: http://www.jstage.jst.go.jp/article/jsme1958/11/47/11_47_785/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可