2011 Fiscal Year Final Research Report
Theoretical development for micro-and nano-scale plasticity that takes account of long range force of dislocations and its verification
| Project/Area Number |
22760074
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Nagoya University |
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Principal Investigator |
OKUMURA Dai 名古屋大学, 工学研究科, 講師 (70362283)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 塑性 / 転位 / 材料強度 / 離散転位塑性法 / ひずみこう配理論 |
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| Research Abstract |
In this study, plastic size effects of lamellar composites were analyzed using a discrete dislocation plasticity approach. The present approach was verified by analyzing a model lamellar composite including edge dislocations fixed at interfaces. In analyses, the thickness and the stiffness of elastic layers as well as the slip plane gap between elastic-plastic layers were considered as parameters. It was thus found, in the case where elastic layer's thickness is several dozen nm, that strain hardening in elastic-plastic layers depends considerably on the slip plane gap between elastic-plastic layers, and that this effect is attributed to the long range stress due to dislocation pile-ups in adjacent elastic-plastic layers.
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