Parameter Identification for Thermo-Mechanical Constitutive Modeling to Describe Process-Induced Residual Stresses and Phase Transformations in Low-Carbon Steels
Reinforcing steel bars (rebars) are widely manufactured using the Tempcore™ process. Several studies have been conducted analyzing the effect of the heat treatment route on the strength and corrosion resistance of rebars, but knowledge of its effects on the residual stresses of the finished product...
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MDPI AG
2021-01-01
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| author | Muhammed Zubair Shahul Hameed Christoph Hubertus Wölfle Tobias Robl Thomas Obermayer Stefan Rappl Kai Osterminski Christian Krempaszky Ewald Werner |
| author_facet | Muhammed Zubair Shahul Hameed Christoph Hubertus Wölfle Tobias Robl Thomas Obermayer Stefan Rappl Kai Osterminski Christian Krempaszky Ewald Werner |
| author_sort | Muhammed Zubair Shahul Hameed |
| collection | DOAJ |
| description | Reinforcing steel bars (rebars) are widely manufactured using the Tempcore™ process. Several studies have been conducted analyzing the effect of the heat treatment route on the strength and corrosion resistance of rebars, but knowledge of its effects on the residual stresses of the finished product are largely lacking. This paper presents experimental investigations to identify the material parameters necessary to simulate the Tempcore™ process using thermo-elasto-plastic constitutive modeling in order to study the generation of residual stresses during the manufacturing process. Mechanical parameters such as yield strength at elevated temperatures and elastic constants were determined experimentally. A continuous cooling transformation diagram needed to model the phase transformations was also identified and is presented here. Residual stress distributions in the surface region of the rebar were characterized using X-ray diffraction. Further characterizations of microstructure, chemical composition, and hardness were carried out. The constitutive modeling approach for the numerical simulation is briefly described for which the experimentally determined parameters are required as input. |
| first_indexed | 2024-03-09T05:38:46Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T05:38:46Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj.art-26e27876bf4b4d838b2c0a1d51708dfa2023-12-03T12:26:32ZengMDPI AGApplied Sciences2076-34172021-01-0111255010.3390/app11020550Parameter Identification for Thermo-Mechanical Constitutive Modeling to Describe Process-Induced Residual Stresses and Phase Transformations in Low-Carbon SteelsMuhammed Zubair Shahul Hameed0Christoph Hubertus Wölfle1Tobias Robl2Thomas Obermayer3Stefan Rappl4Kai Osterminski5Christian Krempaszky6Ewald Werner7Institute of Materials Science and Mechanics of Materials, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, GermanyInstitute of Materials Science and Mechanics of Materials, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, GermanyInstitute of Materials Science and Mechanics of Materials, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, GermanyInstitute of Materials Science and Mechanics of Materials, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, GermanyCentre for Building Materials, Technical University of Munich, Franz-Langinger-Strasse 10, 81245 Munich, GermanyCentre for Building Materials, Technical University of Munich, Franz-Langinger-Strasse 10, 81245 Munich, GermanyInstitute of Materials Science and Mechanics of Materials, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, GermanyInstitute of Materials Science and Mechanics of Materials, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, GermanyReinforcing steel bars (rebars) are widely manufactured using the Tempcore™ process. Several studies have been conducted analyzing the effect of the heat treatment route on the strength and corrosion resistance of rebars, but knowledge of its effects on the residual stresses of the finished product are largely lacking. This paper presents experimental investigations to identify the material parameters necessary to simulate the Tempcore™ process using thermo-elasto-plastic constitutive modeling in order to study the generation of residual stresses during the manufacturing process. Mechanical parameters such as yield strength at elevated temperatures and elastic constants were determined experimentally. A continuous cooling transformation diagram needed to model the phase transformations was also identified and is presented here. Residual stress distributions in the surface region of the rebar were characterized using X-ray diffraction. Further characterizations of microstructure, chemical composition, and hardness were carried out. The constitutive modeling approach for the numerical simulation is briefly described for which the experimentally determined parameters are required as input.https://www.mdpi.com/2076-3417/11/2/550residual stressconstitutive modelingquenchingTempcore™ processreinforcing steel |
| spellingShingle | Muhammed Zubair Shahul Hameed Christoph Hubertus Wölfle Tobias Robl Thomas Obermayer Stefan Rappl Kai Osterminski Christian Krempaszky Ewald Werner Parameter Identification for Thermo-Mechanical Constitutive Modeling to Describe Process-Induced Residual Stresses and Phase Transformations in Low-Carbon Steels Applied Sciences residual stress constitutive modeling quenching Tempcore™ process reinforcing steel |
| title | Parameter Identification for Thermo-Mechanical Constitutive Modeling to Describe Process-Induced Residual Stresses and Phase Transformations in Low-Carbon Steels |
| title_full | Parameter Identification for Thermo-Mechanical Constitutive Modeling to Describe Process-Induced Residual Stresses and Phase Transformations in Low-Carbon Steels |
| title_fullStr | Parameter Identification for Thermo-Mechanical Constitutive Modeling to Describe Process-Induced Residual Stresses and Phase Transformations in Low-Carbon Steels |
| title_full_unstemmed | Parameter Identification for Thermo-Mechanical Constitutive Modeling to Describe Process-Induced Residual Stresses and Phase Transformations in Low-Carbon Steels |
| title_short | Parameter Identification for Thermo-Mechanical Constitutive Modeling to Describe Process-Induced Residual Stresses and Phase Transformations in Low-Carbon Steels |
| title_sort | parameter identification for thermo mechanical constitutive modeling to describe process induced residual stresses and phase transformations in low carbon steels |
| topic | residual stress constitutive modeling quenching Tempcore™ process reinforcing steel |
| url | https://www.mdpi.com/2076-3417/11/2/550 |
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