Simulation method of spall damage for self-radiation damage aging materials with helium bubbles

ZHANG Fengguo; LIU Jun; WANG Yanjin; WANG Pei; ZHENG Hui

doi:10.11883/bzycj-2022-0486

Volume 43 Issue 10

Oct. 2023

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ZHANG Fengguo, LIU Jun, WANG Yanjin, WANG Pei, ZHENG Hui. Simulation method of spall damage for self-radiation damage aging materials with helium bubbles[J]. Explosion And Shock Waves, 2023, 43(10): 103105. doi: 10.11883/bzycj-2022-0486

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ZHANG Fengguo, LIU Jun, WANG Yanjin, WANG Pei, ZHENG Hui. Simulation method of spall damage for self-radiation damage aging materials with helium bubbles[J]. Explosion And Shock Waves, 2023, 43(10): 103105. doi: 10.11883/bzycj-2022-0486

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Simulation method of spall damage for self-radiation damage aging materials with helium bubbles

doi: 10.11883/bzycj-2022-0486

Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

Received Date: 2022-11-02
Rev Recd Date: 2023-03-20
Publish Date: 2023-10-27

Abstract

Abstract

Under irradiation conditions, a large number of micro-defects such as helium bubbles are produced in some materials, and the size and number density of helium bubbles increase with the increase of irradiation years. The variation of helium bubble distribution not only affects the physical and mechanical properties of the material itself, but also directly affects the distribution characteristics of fracture particle size in the later stage of spallation damage evolution. The evolution process of spallation damage in ductile materials generally includes nucleation, growth and confluence of pores. However, due to the inhibition of existing pores on new nucleation pores, when the initial number density of pores reaches a certain critical value, the calculation of spallation damage may not consider the influence of new nucleation. Based on the characteristics of early damage evolution, a formula for calculating this critical value is given, and based on this formula, the calculation method of spallation damage of plutonium materials irradiated by helium bubbles is further discussed. Then, in view of the difference between the initial damage parameters of the damage model and the real initial damage of the material, we propose a method to determine the damage parameters in the void growth (VG) model. Finally, this problem is analyzed qualitatively by using the experimental results of spallation of conventional aluminum materials containing helium bubbles. The analysis results show that for the calculation of spallation damage of irradiated materials containing helium bubbles, only when the helium bubble size changes little and the helium bubble concentration is lower than the critical helium bubble concentration given in this paper, it is necessary to consider the comprehensive influence of initial helium bubbles and new holes. otherwise, a simple spallation damage model can be adopted, and the nucleation of holes does not need to be calculated.
- helium bubbles,
- spall damage,
- self-radiation damage aging,
- critical concentration of helium bubbles

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References(28)

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