圧こん予き裂からのき裂進展によるアルミナのＲ曲線挙動

• 鈴木 賢治

  新潟大学教育学部生活科学講座

• 田中 啓介

  名古屋大学工学部機械工学科

• 坂井田 喜久

  (財)ファインセラミックスセンター

• 山岸 裕之

  新潟大学大学院

書誌事項

タイトル別名

• R-Curve Behavior for Stable Crack Growth from Indentation Cracks in Alumina.
• アッコン ヨキレツ カラ ノ キレツ シンテン ニヨル アルミナ ノ R キョ

抄録

A new experimental system was developed to record the optical microscopic image of slow crack growth in ceramics together with the applied stress value. The bending stress was applied to pressurelesssintered alumina with Vickers indentation cracks, and the slow crack growth behavior was observed with this new system. The relation between the applied stress intensity factor K_app and P/c^3/2 (P=the indentation load, c=the half crack length) becomes linear with the crack extension. From the linear relation, the fracture toughness K_∞ for long cracks and a χ parameter in equation K_res=χ·P/c^3/2 (K_res=the stress intensity factor due to indentation residual stress) were obtained. The increasing R-curve for small cracks was determined by using the above determined χ parameter. The resistance became constant as the crack extension was longer than 0.15mm, and this constant value was identical to the fracture toughness determined by using a single-edge-precracked beam.

収録刊行物

• 材料

  材料 44 (504), 1133-1137, 1995

  公益社団法人 日本材料学会

キーワード

• Ceramics
• <i>R</i>-curve
• Indentation crack
• Stable crack growth
• In-situ observation

詳細情報

• CRID: 1390001205391659136
• NII論文ID: 110002292966
• NII書誌ID: AN00096175
• DOI: 10.2472/jsms.44.1133
• ISSN: 18807488
• ISSN: 05145163
• ISSN: http://id.crossref.org/issn/05145163
• NDL書誌ID: 3622063
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3622063
• 本文言語コード: ja
• 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