2010 Fiscal Year Final Research Report
Development of forming limit prediction method for anisotropic steel tube subjected to combined loading paths and experimental validation
| Project/Area Number |
20360324
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
KUWABARA Toshihiko Tokyo University of Agriculture and Technology, 大学院・工学研究院, 教授 (60195609)
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| Co-Investigator(Renkei-kenkyūsha) |
YOSHIDA Kengo 山形大学, 大学院・理工学研究科, 助教 (70436236)
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| Project Period (FY) |
2008 – 2010
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| Keywords | チューブハイドロフォーミング / 鋼管 / 異方性降伏関数 / 降伏曲面 / 成形限界ひずみ / 成形限界応力 / 材料試験 / 複合負荷経路 |
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| Research Abstract |
A servo-controlled biaxial tensile tenting machine for sheet metals was developed to measure the biaxial stress-strain curves of test samples in a strain range up to fracture with no unloading. The sheet sample was bent and welded to make a tubular specimen and combined tension-internal pressure was applied to it using the testing apparatus. The deformation behavior and forming limit stresses and strains of cold rolled IF steel sheet (SPCE) and high strength steel tube under linear and combined stress paths were successfully measured. The experimental tendencies were in qualitative agreed with those calculated using the strain localization analysis based on the Marciniak-Kuczy?ski approach.
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