| Project/Area Number |
01460225
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
溶接工学
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| Research Institution | Yokohama National University |
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Principal Investigator |
OGURA Nobukazu Yokohama National University, Faculty of Engineering, Professor, 工学部・物質工学科, 教授 (10017949)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAI Yuzuru Yokohama National University, Faculty of engineering, Research Associate, 工学部・物質工学科, 助手 (90114975)
ANDOU Kotoji Yokohama National University, Fuculty of engineering, Associate Professor, 工学部・物質工学科, 助教授 (40017992)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 1990: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1989: ¥3,800,000 (Direct Cost: ¥3,800,000)
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| Keywords | Expert system / Fracture / Accident / Human Error / Human Miss / 破壊事故 / 溶接構造物の破壊 |
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| Research Abstract |
The survey was undertaken in order to evaluate failures from the viewpoint of artificial miss or human error. A total of 38 failures was studied. These failures occurred in structure such as tanks, bridges, pressure vessels, boilers, cylinders, pipes as well as others. The great majority of failures apparently occur under the condition in which artificial miss or human error was included. In short, careful design, prudent selection of materials, serious consideration given on workmanship, cautious examination are of the great importance in the prevention of failures.
Recently, structures are becoming more large scale, complicated and their operating conditions are getting more severe. Therefore, much effort is required to secure enough safety. On this point of view, with the aim of reducing engineer's work load, an expert system has been developed to support in making decisions whether a cracking component is safe or not following the codes or standards. Next three codes or standards are adopted.
a) ASME Boiler and Pressure Vessel Code Sect. XI
b) BSI PD 6493 Draft Published Document (Revision of PD 6493)
c) "Crack tip opening displacement (CTOD) Methods for fracture assessments : Proposals for revisions to BSI PD 6493" by S. J. Garwood, et al
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