Research on Stiffness Characteristics of Hold-down Spring Based on Johnson-Cook Constitutive Model

Yang Ningrui; Wu Xingwen; Liang Shulin; Qin Mian; Zhu Fawen; Wang Haoyu; Liu Menglong

doi:10.13832/j.jnpe.2022.04.0091

Volume 43 Issue 4

Aug. 2022

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Article Navigation > Nuclear Power Engineering > 2022 > 43(4): 91-98

Yang Ningrui, Wu Xingwen, Liang Shulin, Qin Mian, Zhu Fawen, Wang Haoyu, Liu Menglong. Research on Stiffness Characteristics of Hold-down Spring Based on Johnson-Cook Constitutive Model[J]. Nuclear Power Engineering, 2022, 43(4): 91-98. doi: 10.13832/j.jnpe.2022.04.0091

Citation:

Yang Ningrui, Wu Xingwen, Liang Shulin, Qin Mian, Zhu Fawen, Wang Haoyu, Liu Menglong. Research on Stiffness Characteristics of Hold-down Spring Based on Johnson-Cook Constitutive Model[J]. Nuclear Power Engineering, 2022, 43(4): 91-98. doi: 10.13832/j.jnpe.2022.04.0091

Citation:

Yang Ningrui, Wu Xingwen, Liang Shulin, Qin Mian, Zhu Fawen, Wang Haoyu, Liu Menglong. Research on Stiffness Characteristics of Hold-down Spring Based on Johnson-Cook Constitutive Model[J]. Nuclear Power Engineering, 2022, 43(4): 91-98. doi: 10.13832/j.jnpe.2022.04.0091

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Research on Stiffness Characteristics of Hold-down Spring Based on Johnson-Cook Constitutive Model

doi: 10.13832/j.jnpe.2022.04.0091

1.
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, China
2.
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, China
3.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2021-06-28
Accepted Date: 2021-08-16
Rev Recd Date: 2021-08-05
Publish Date: 2022-08-04

Abstract

Abstract

The stiffness design of hold-down spring in fuel assembly plays an important role in its safe service. By introducing the Johnson-Cook nonlinear constitutive relation of INCONEL 718 Alloy, the Johnson-Cook nonlinear constitutive model of INCONEL 718 Alloy under different neutron irradiation doses is fitted; the finite element model of the hold-down spring system is established, and the influence of different factors on the stiffness characteristics of the hold-down spring is studied. The results show that the increase of temperature, loading times and amplitude lead to different degrees of softening of the hold-down spring under cyclic loading, while the increase of the loading rate makes the stiffness of the hold-down spring harden. The study in this paper can provide a reference for the stiffness design of the hold-down spring in the fuel assembly.
- Hold-down spring,
- Stiffness characteristics,
- Johnson-Cook nonlinear constitutive model

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References(16)

References

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