2012 Fiscal Year Final Research Report
Prediction of brittle fracture initiatedtoeast growing from weld defectsofductile cracks
| Project/Area Number |
22560579
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | Sojo University |
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Principal Investigator |
AZUMA Koji 崇城大学, 工学部, 准教授 (80320414)
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| Co-Investigator(Kenkyū-buntansha) |
IWASHITA Tsutomu 有明工業高等専門学校, 建築学科, 准教授 (10332090)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 鋼構造 / 柱梁接合部 / 脆性破壊 / 溶接欠陥 / 塑性拘束 |
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| Research Abstract |
Welded plate bend models, which were designed to represent a connection of anI-section beam to an RHS column member with through diaphragms, were tested under cyclic loads in order to investigate the correlation of defect size, dimensions and quantity of ductile crack growth. Test results supported prediction; brittle fracture occurred from tips of defects. It was attempted to predict the fracture moment. The predicted moments using J values which were taken into account plastic constraint of crack tips roughly coincide with the test results.
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