Simulation study on fluctuant flow stress scale effect

Crystal plasticity theory was used to simulate upsetting tests of different dimensions and grain size micro copper cylinders in this study on the fluctuant flow stress scale effect. Results showed that with the decrease of billet grain quantity, flow stress fluctuation is not always increased, but t...

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Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2006-08, Vol.7 (8), p.1343-1350
Main Authors: Shen, Yu, Yu, Hu-ping, Ruan, Xue-yu
Format: Article
Language:English
Subjects:
压力尺度效应
微变形
数值模拟
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Summary:Crystal plasticity theory was used to simulate upsetting tests of different dimensions and grain size micro copper cylinders in this study on the fluctuant flow stress scale effect. Results showed that with the decrease of billet grain quantity, flow stress fluctuation is not always increased, but there is a maximum. Through this study, the fluctuant flow stress scale effect can be understood deeper, and relevant necessary information was obtained for further prediction and control of this scale effect and to design the microforming process and die.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.2006.A1343