2016 Fiscal Year Final Research Report
Identifying elasto-plastic material properties by strain measurement with digital image correlation
| Project/Area Number |
26420024
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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 |
Materials/Mechanics of materials
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| Research Institution | Aoyama Gakuin University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 逆問題 / 材料特性 / 弾塑性 / 画像相関法 / ひずみ測定 |
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| Outline of Final Research Achievements |
A method for inversely identifying elasto-plastic material properties from displacement fields measured by global digital image correlation. In order to avoid the accumulation of measurement errors, total strain theory is used as a constitutive equation. A peicewise virtual fields method with a finite element mesh is sued for the implementation of the inverse analysis. The effectiveness of the proposed method is demonstrated by identifying the material proper-ties of a pure aluminum specimen from the displacement fields. Results show that the stress-strain relation after yielding can be evaluated from a single set of displacement fields under a single load but better results are obtained when multiple displacement fields under various loads are used as input data.
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| Free Research Field |
材料力学，実験力学
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