Dynamic Mechanical Behavior of G550 Cold-Formed Steel under High Temperature and High Strain Rate

YAN Jitao; CHEN Wenfei; ZHANG Hao; YOU Jian; SHI Chaoming; JIANG Haocheng; ZHU Jue

doi:10.11858/gywlxb.20220705

Volume 37 Issue 2

Apr 2023

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Chinese Journal of High Pressure Physics > 2023 > 37(2): 024101.

YAN Jitao, CHEN Wenfei, ZHANG Hao, YOU Jian, SHI Chaoming, JIANG Haocheng, ZHU Jue. Dynamic Mechanical Behavior of G550 Cold-Formed Steel under High Temperature and High Strain Rate[J]. Chinese Journal of High Pressure Physics, 2023, 37(2): 024101. doi: 10.11858/gywlxb.20220705

Citation:

YAN Jitao, CHEN Wenfei, ZHANG Hao, YOU Jian, SHI Chaoming, JIANG Haocheng, ZHU Jue. Dynamic Mechanical Behavior of G550 Cold-Formed Steel under High Temperature and High Strain Rate[J]. Chinese Journal of High Pressure Physics, 2023, 37(2): 024101. doi: 10.11858/gywlxb.20220705

Citation:

YAN Jitao, CHEN Wenfei, ZHANG Hao, YOU Jian, SHI Chaoming, JIANG Haocheng, ZHU Jue. Dynamic Mechanical Behavior of G550 Cold-Formed Steel under High Temperature and High Strain Rate[J]. Chinese Journal of High Pressure Physics, 2023, 37(2): 024101. doi: 10.11858/gywlxb.20220705

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Dynamic Mechanical Behavior of G550 Cold-Formed Steel under High Temperature and High Strain Rate

doi: 10.11858/gywlxb.20220705

YAN Jitao^{1, 2
,},
CHEN Wenfei³,
ZHANG Hao^{1, 2},
YOU Jian^{1, 2},
SHI Chaoming^{1, 2},
JIANG Haocheng^{1, 2},
ZHU Jue^{1, 2,*
,
,}

1.
Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline, Ningbo University, Ningbo 315211, Zhejiang, China
2.
Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, Zhejiang, China
3.
Ningbo Special Equipment Inspection and Research Institute, Ningbo 315211, Zhejiang, China

Received Date: 08 Dec 2022
Rev Recd Date: 28 Dec 2022

Available Online: 04 Apr 2023

Issue Publish Date: 05 Apr 2023

Abstract

Abstract

To study the dynamic mechanical properties of G550 cold-formed steel under high temperature and high strain rate, high-temperature synchronous controlled dynamic loading device (split Hopkinson tensile bar) was implemented. The medium strain rate tensile tests were also conducted with the high-speed hydraulic tensile testing machine. The constitutive model and the influence of temperature and strain rate on the flow stress were built and explored through the stress-strain curve and the microscopic analysis. The results show that G550 cold-formed steel has significant strain rate strengthening and temperature softening effects. In the specific high strain rate range (1000−1500 s⁻¹), the influence of temperature on the flow stress is more significant than that of strain rate. Then, a modified Johnson-Cook constitutive model of G550 cold-formed steel was proposed according to the temperature softening coefficient. This model can better describe the dynamic mechanical behavior of G550 cold-formed steel under high temperature and high strain rate, and can contribute to the finite element simulation of G550 cold-formed steel under high temperature and explosion impact.
- G550 cold-formed steel,
- high temperature,
- high strain rate,
- constitutive model

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References(23)

References

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Dynamic Mechanical Behavior of G550 Cold-Formed Steel under High Temperature and High Strain Rate

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