Lumped parameter model with inner state variables for modeling hot deformability of steels
A novel method for description of stress-strain relationship for hot deformability of steels is presented. Laplacian transformation of stress-strain data obtained on cylindrical hot compression tests offer simple description of dynamical input/output relationship between strain (input) and stress (o...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Croatian Metallurgical Society
2017-01-01
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| Series: | Metalurgija |
| Subjects: | |
| Online Access: | http://hrcak.srce.hr/file/249293 |
| Summary: | A novel method for description of stress-strain relationship for hot deformability of steels is presented. Laplacian transformation of stress-strain data obtained on cylindrical hot compression tests offer simple description of dynamical input/output relationship between strain (input) and stress (output). In this paper, strain/stress relationship is described using transfer function of the third order. Parameters of transfer function are determined by numerical optimization for temperatures 1 000, 1 100 and 1 200 °C and logarithmic strain rates 10, 5 and 1 s<sup>-1</sup>. Obtained relative model error is around 1 % for logarithmic deformations in the range 0,1 < < 0,8. |
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| ISSN: | 0543-5846 1334-2576 |