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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.2
- 수록면
- 18 - 27 (10page)
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초록· 키워드
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A comparative study was performed on strain-compensated Arrhenius-type constitutive models established with two regression methods: polynomial regression and regression Kriging. For measurements at high temperatures, experimental data of 70Cr3Mo steel were adopted from previous research. An Arrhenius-type constitutive model necessitates strain compensation for material constants to account for strain effect. To associate the material constants with strain, we first evaluated them at a set of discrete strains, then capitalized on surrogate modeling to represent the material constants as a function of strain. As a result, disparate flow stress models were formed via the two different regression methods. The constructed constitutive models were examined systematically against measured flow stresses by validation methods. The predicted material constants were found to be quite accurate compared to the actual material constants. However, notable mismatches between measured and predicted flow stresses were revealed by the proposed validation techniques, which carry out validation with not the entire, but a single tensile test case.
목차
Abstract
1. Introduction
2. Formulations
3. Material Constants Modeling
4. Flow Stress Model Validation
5. Conclusion
REFERENCES
참고문헌 (15)
참고문헌 신청
Y. C. Lin, X. M. Chen, 2011, A Critical Review of Experimental Results and Constitutive Descriptions for Metals and Alloys in Hot Working, Mater. Des., Vol. 32, No. 4, pp. 1733~1759.
H. Y. Li, D. D. Wei, Y. H. Li, and X. F. Wang, 2012, Application of Artificial Neural Network and Constitutive Equations to Describe the Hot Compressive Behavior of 28CrMnMoV Steel, Mater. Des., Vol. 35, pp. 557~562.
A. K. Gupta, S. K. Singh, S. Reddy, and G. Hariharan, 2012, Prediction of Flow Stress in Dynamic Strain Aging regime of Austenitic Stainless Steel 316 Using Artificial Neural Network, Mater. Des., Vol. 35, pp. 589~595.
A. K. Sulochana, C. Phaniraj, C. Ravishankar, A. K. Bhaduri, and P. V. Sivaprasad, 2011, Prediction of High Temperature Flow Stress in 9Cre1Mo Ferritic Steel During Hot Compression, Int. J. Pres. Ves. Pip., Vol. 88, No. 11, pp. 501~506.
F. Ren and J. Chen, 2013, Modeling Flow Stress of 70Cr3Mo Steel Used for Back-Up Roll During Hot Deformation Considering Strain Compensation, J. Iron Steel Res. Int., Vol. 20, No. 11, pp. 118~124.
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UCI(KEPA) : I410-ECN-0101-2017-551-002125481