2017 Fiscal Year Final Research Report
Ductile fracture prediction in upset forging by a microscopic void model
| Project/Area Number |
26420747
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Material processing/Microstructural control engineering
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| Research Institution | Daido University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Keywords | 延性破壊 / 微視的空孔モデル / 鍛造加工 |
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| Outline of Final Research Achievements |
Ductile fracture, which occurs when a material is subjected to large plastic deformation, is troublesome during metal-forming processes. Numerous ductile fracture criteria have been proposed for various materials. However, a ductile fracture criterion that is applicable to all metal-forming processes has not been found. Ductile fracture is a microscopic phenomenon because it occurs through nucleation, growth, and coalescence of voids. However, ductile fracture criteria that are widely used for metal-forming processes are derived from a macroscopic viewpoint.
The author proposed a void model from a microscopic viewpoint, in which void coalescence is predicted by the upper bound theory whose physical meaning is definite. In this study, ductile fracture in upset forging was predicted by the microscopic void model.
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| Free Research Field |
塑性力学，破壊力学
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