Experimental Study on Brittle Crack Propagation Behavior with Large Scale Structural Component Model Tests : Brittle Crack Arrest Design for Large Container Ships-5

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概要

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• Brittle fracture of the hull structure has the possibility to cause serious structural damage and so it should be avoided. Therefore, it is important to ensure the hull structural integrity by preventing brittle cracks from being initiated and also by providing a proper means for arresting a brittle crack when crack propagation occurs. In the last 4 papers of ISOPE 2010, the authors investigated a proper brittle crack arrest design for large container carriers by carrying out a number of large-scale and middle-scale fracture tests. As a result, it was concluded that the required brittle crack arrest toughness value K_<ca> should be more than 6,000N/mm^<3/2> to arrest brittle cracks in thick steel plates exceeding 50mm. In previous papers, the required K_<ca> value was established based on structural component model tests which mainly simulated a brittle crack which was initiated in the hatch side coaming and propagated to the strength deck (Scenario 1) because this scenario was considered to be the severest case for arresting brittle cracks. Following previous papers, the authors have carried out large-scale and full-scale structural component model tests simulating a brittle crack which was initiated in the strength deck and propagated to the hatch side coaming (Scenario 2). Results of the structural component model tests of Scenario 2 are presented in this paper with comparison to Scenario 1's results. Furthermore, the authors propose a supplement of the brittle crack arrest designs considering Scenario 2.

• 一般財団法人日本海事協会の論文

著者

• Yajima Hiroshi

  Nagasaki Inst. Of Ap. Sc.

• YOSHINARI Hitoshi

  National Research Institute for Metals

• Yajima Hiroshi

  Nagasaki Institute Of Applied Science

• Inoue Takehiro

  Nippon Steel Corporation

• Aihara Shuji

  The University of Tokyo

• Hirota Kazuhiro

  Mitsubishi Heavy Industries, Ltd.

• Toyoda Masanobu

  IHI Marine United Inc.

• Handa Tsunehisa

  JFE Steel Corporation

• Tani Tokutaka

  Kobe Steel Ltd.

• Hirota Kazuhiro

  Mitsubishi Heavy Industries Ltd.

• Kawabata Tomoya

  Sumitomo Metal Industries Ltd.

• Kiyosue Takaaki

  Kawasaki Heavy Industries Ltd.

• Kubo Akifumi

  Nippon Kaiji Kyokai(ClassNK)

• Yamaguchi Yoshiya

  Nippon Kaiji Kyokai(ClassNK)

• Yoshinari Hitoshi

  National Maritime Research Institute

関連論文

• Evaluation Method of the Brittle Fracture Strength in Structurally Stress-Concentrated Regions
• 11. Evaluation Method of the Brittle Fracture Strength in Structurally Stress Concentrated Regions
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• 7. Effect of Line-Heating on Notch Toughness of 50 kg/mm^2-Class High-Tensile Steel Plates
• Effect of Fabricating Process on Notch Toughness of Shipbuilding Steel Plates (Report I) : Effect of Line-Heating on Notch Toughness of 50 kg/mm^2-Class High-Tensile Steel Plates
• Effect of Structural Discontinuities of Welded Joints on Brittle Crack Propagation Behavior : Brittle Crack Arrest Design for Large Container Ships-3
• Near-Threshold Fatigue Crack Propagation in Welded Joints under Random Loadings
• Development of Brittle Crack Arrest Toughness K_ Test Method : Brittle Crack Arrest Design for Large Container Ships-2
• Required Brittle Crack Arrest Toughness K_ Value with Actual Scale Model Tests : Brittle Crack Arrest Design for Large Container Ships-4
• Development of Guidelines on Brittle Crack Arrest Design : Brittle Crack Arrest Design for Large Container Ships-1
• Thickness Effect on Brittle Fracture Toughness of Weld Metal of High Tensile Strength Steel
• 16. Study on Brittle Crack Propagation and Arrest Behavior in Plate and Beam Structures
• Improvement of fatigue properties by ultrafine grained microstructure in steel plate
• 13. Study on Brittle Crack Propagation and Arrest Behavior in Plate and Beam Structures (2nd Report) : Dynamic Fracture Toughness of Ship Hull Steels
• Experimental Study on Brittle Crack Propagation Behavior with Large Scale Structural Component Model Tests : Brittle Crack Arrest Design for Large Container Ships-5
• Thickness Effect on the Brittle Crack Arrest Toughness Value (K_) : Brittle Crack Arrest Design for Large Container Ships-6

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