浅いV切欠きをもつ大型構造要素の脆性破壊強度評価へのローカルアプローチの適用 : 破壊制御設計へのローカルアプローチの展開(第5報)
書誌事項
- タイトル別名
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- Local Approach to Brittle Fracture Strength Evaluation of Large Component with Shallow V-Notch
- 浅いV切欠きをもつ大型構造要素の脆性破壊強度評価へのローカルアプローチの適用
- アサイ V キリカキ オ モツ オオガタ コウゾウ ヨウソ ノ ゼイセイ ハカイ キョウド ヒョウカ エ ノ ローカルアプローチ ノ テキヨウ ハカイ セイギョ セッケイ エ ノ ローカルアプローチ ノ テンカイ ダイ5ホウ
- Application of the Local Approach to Fracture Control Design (Part 5)
- 破壊制御設計へのローカルアプローチの展開 (第5報)
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説明
This paper employs the Local Approach for the evaluation of the fracture performance of a large structural component. The material used is a high strength steel of 490MPa class for steel-framed structures. Hollow-section beam specimens are constructed, where shallow V-notches are introduced at the edge of the flange. Conventional fracture mechanics procedures can not be directly applied to the notched component, because they have a basis on a crack or a crack-like defect. Three-dimensional FE-analysis demonstrates that the shallow V-notched component holds a considerably relaxed stress field compared to the fracture toughness specimen with a deep crack. This is due to a large difference in the near crack/notch tip constraint between the component and toughness specimen. This study insists that the Weibull stress, an integrated stress over the fracture process zone, is a measure of the fracture driving force of both notched and cracked specimens. The fracture load and fracture strain for the hollow-section beam with shallow V-notches can be predicted from the fracture toughness test results based on the Weibull stress criterion ; the critical Weibull stress at brittle fracture initiation is a material property regardless of the type of a notch/crack.
収録刊行物
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- 日本造船学会論文集
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日本造船学会論文集 1999 (186), 465-473, 1999
社団法人 日本船舶海洋工学会
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詳細情報 詳細情報について
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- CRID
- 1390001204094124416
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- NII論文ID
- 110003862301
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- NII書誌ID
- AN00194094
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- ISSN
- 18842070
- 05148499
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- NDL書誌ID
- 4983260
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