期刊
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
卷 137, 期 -, 页码 1-7出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijengsci.2018.12.004
关键词
Torsion; Bar; Aluminum; Dislocations; Thermal softening
资金
- Chinese Government Scholarship Program
A simple extension of the thermodynamic dislocation theory to non-uniform plastic deformations is proposed for an analysis of high-temperature torsion of aluminum bars. Employing a small set of physics-based parameters, which we expect to be approximately independent of strain rate and temperature, we are able to fit experimental torque-twist curves for five different twist rates and at one fixed ambient temperature. We find that thermal softening due to temperature rise is significant at high twist rates. (C) 2018 Elsevier Ltd. All rights reserved.
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