Johnson-Cook constitutive model and failure criterion for nuclear-grade stainless steel Z2CN18.10

PENG Jian; GUO Zehua; LI Xinghua; ZHU Rongfu; HAN Xuejie; QIN Dongyang; TANG Zhongbin; LI Yulong

doi:10.11883/bzycj-2025-0301

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PENG Jian, GUO Zehua, LI Xinghua, ZHU Rongfu, HAN Xuejie, QIN Dongyang, TANG Zhongbin, LI Yulong. Johnson-Cook constitutive model and failure criterion for nuclear-grade stainless steel Z2CN18.10[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0301

Citation:

PENG Jian, GUO Zehua, LI Xinghua, ZHU Rongfu, HAN Xuejie, QIN Dongyang, TANG Zhongbin, LI Yulong. Johnson-Cook constitutive model and failure criterion for nuclear-grade stainless steel Z2CN18.10[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0301

Citation:

PENG Jian, GUO Zehua, LI Xinghua, ZHU Rongfu, HAN Xuejie, QIN Dongyang, TANG Zhongbin, LI Yulong. Johnson-Cook constitutive model and failure criterion for nuclear-grade stainless steel Z2CN18.10[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0301

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Johnson-Cook constitutive model and failure criterion for nuclear-grade stainless steel Z2CN18.10

doi: 10.11883/bzycj-2025-0301

1.
China Nuclear Power Design Company, Ltd., (Shenzhen), Shenzhen 518026, Guangdong, China
2.
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China
3.
Yangjiang Nuclear Power Co., Ltd., Yangjiang 529500, Guangdong, China

Received Date: 2025-09-15
Rev Recd Date: 2026-01-17

Available Online: 2026-01-30

Abstract

Abstract

Nuclear-grade stainless steel Z2CN18.10 is widely used in nuclear power plant piping systems. Its dynamic mechanical behavior under combined high strain rates and elevated temperatures is of great significance for assessing structural integrity under impact loads. To accurately characterize the mechanical behavior of Z2CN18.10 under dynamic loading, quasi-static and high-strain-rate tensile tests were conducted using a universal electronic testing machine and a conventional split Hopkinson tension bar system. The stress-strain responses of the material were obtained within temperature ranges from ambient (25 ℃) up to 400 ℃ and strain rates from 10⁻³ to 10³ s⁻¹. To overcome the limitation of conventional Hopkinson bar apparatus in achieving large-strain loading, an electromagnetically driven bidirectional Hopkinson tension bar system was employed to measure the failure strain of the material under different stress triaxialities. Based on the experimental data, parameters for the Johnson-Cook constitutive model and failure criterion were fitted, and the validity of the model was verified through high-speed impact tests using a gas gun. The results show that the differences between numerical simulations and experiments in terms of perforation diameter, peak strain, and support reaction force were 4.4%, 7.5%, and 2.3%, respectively, indicating good agreement. The established reliable dynamic constitutive model and failure criterion for Z2CN18.10 stainless steel provide an important methodological and data foundation for the impact-resistant design and safety assessment of nuclear power piping systems.
- stainless steel material Z2CN18.10,
- Johnson-Cook constitutive model,
- Johnson-Cook failure criterion,
- electromagnetic-Hopkinson bar,
- high-speed impact test

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References(20)

References

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