2012 Fiscal Year Final Research Report
Theoretical Study of The Occurrence Limit of Strain Nonuniformity in Cylinders, based on the Prediction of In-plane Bifurcation
| Project/Area Number |
22560568
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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 | Okayama University of Science (2011-2012)
The University of Shiga Prefecture (2010) |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Keywords | 座屈 / 繰り返し載荷 / 鋼管 / 有限要素法 / 複合加力材料試験 |
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| Research Abstract |
Hysteretic behavior numerical analysis has been carried out for elastic-plastic thin-walled cylinders subjected to a constant axial compressive force and cyclic torsion. It has been shown that various deformation modes appear, which are different from those under the constant axial contraction, and that those modes cause rapid growth of strain nonuniformity. Also the theory for predicting this phenomenon has been generalized to the alternating plasticity region and the numerical analysis program has been developed. Since this phenomenon is analogous to internal buckling, finite element analysis for it has been performed.
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