Abstract
In order to obtain a constitutive model that can accurately describe the stress flow law of 05Cr17Ni4Cu4Nb stainless steel in extrusion forming process of spherical plain bearings, the quasi-static tensile tests of this material were carried out at room temperature in this paper, the engineering stress-strain curves of the material were obtained. Six constitutive equations were obtained by fitting the stress-strain data between the yield point and the necking point, the errors of the six models with the experimental data were analyzed. The results indicate that the Swift-Voce constitutive model had the highest correlation coefficient, the smallest mean square deviation with the experimental data and the best prediction accuracy at pre-necking and post-necking stage. Therefore, the Swift-Voce constitutive model was selected as the constitutive model of 05Cr17Ni4Cu4Nb stainless steel with large deformation at room temperature, and the finite element simulation technology was used to verify the Swift-Voce constitutive model. Once again, the simulation results show that, the stress-strain curve at pre-necking stage of the material is in good agreement with the test data. This constitutive model established in this paper can accurately describe the stress flow behavior of the material at room temperature.
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Abbreviations
- σ E :
-
Engineering stress
- σ T :
-
True stress
- σ S :
-
Material yield stress
- σ Ludwik :
-
Flow stress of Ludwik model
- σ Swft :
-
Flow stress of Swift model
- σ H-S :
-
Flow stress of Hockett-Sherby model
- σ Voce :
-
Flow stress of Voce model
- σ S-V :
-
Flow stress of Swift-Voce model
- σ Voce++ :
-
Flow stress of Voce++ model
- ε E :
-
Engineering strain
- ε T :
-
True strain
- ε p :
-
Plastic strain
- ε 0 :
-
Material yield strain
- n:
-
Strain hardening exponent
- KL, KS, KS-H, KV, KS-V, KV++, m, C, D:
-
Material strength coefficients need to be fitted
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Acknowledgments
This work is supported by Shanghai Science and Technology Commission (Research and manufacture of serial robot cross roller bearing 20511105602), China.
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Linlin Zhu received her Master degree in Mechanical Manufacturing from Harbin Engineering University in 2013 China. Now, she is a Senior Engineer, working in technical department of Shanghai Bearing Technology Research Institute, China. Her research interests include plastic forming of metal, spherical bearing assemble technology and engineering application of finite element analysis technique.
Xiongrong Huang received her master degree in Material from Tongji University in 2009, China. She works as a Senior Engineer and the Director of Technical Department of Shanghai Bearing Technology Research Institute, China. Her research interests include special bearing design, bearing material application research, friction surface modification technology and failure analysis. She developed a kind of self-lubricating spherical bearing that are resistant with high temperature and corrosion.
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Zhu, L., Huang, X. & Liu, H. Study on constitutive model of 05Cr17Ni4Cu4Nb stainless steel based on quasi-static tensile test. J Mech Sci Technol 36, 2871–2878 (2022). https://doi.org/10.1007/s12206-022-0519-6
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DOI: https://doi.org/10.1007/s12206-022-0519-6