Enhancement in the Modeling of Temperature and Strain Rate-Dependent Plastic Hardening Behavior of a Sheet Metal
SCIE
SCOPUS
- Title
- Enhancement in the Modeling of Temperature and Strain Rate-Dependent Plastic Hardening Behavior of a Sheet Metal
- Authors
- Leem, D; Bong, HJ; Barlat, F; Lee, MG; Song, JH; Kim, D
- Date Issued
- 2015-08
- Publisher
- WILEY-V C H VERLAG GMBH
- Abstract
- In the present study, viscoplastic hardening behavior of aluminum alloy 3003 sheet was measured and existing hardening models were evaluated in terms of the accuracy for predicting strain rate and temperature-dependent flow behaviors. Moreover, a modified hardening model was proposed to capture the flow stress-strain responses under various strain rates and temperatures with enhanced accuracy. Mechanical responses of the material were measured by using uniaxial tensile test at various temperature (approximate to 25-250 degrees C) and strain rates (approximate to 0.001-0.3 s(-1)), and the split Hopkinson pressure bar (SHPB) test was also conducted to obtain flow behavior at the strain rate over 700 s(-1) at room temperature. Based on these experimental data, two well accepted viscoplastic constitutive models-Johnson-Cook and Khan-Huang-Liang-were evaluated. Finally, the Hollomon/Voce type model was further developed, which resulted in significant improvement in predicting the flow stress curves under wide range of strain rate and temperature.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/36312
- DOI
- 10.1002/SRIN.201500006
- ISSN
- 1611-3683
- Article Type
- Article
- Citation
- STEEL RESEARCH INTERNATIONAL, vol. 86, no. 8, page. 902 - 914, 2015-08
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