Dynamic constitutive relationship of CuCrZr alloy based on Johnson-Cook model

Nuclear Materials and Energy

Xuebing Peng¹  Yanpeng Wei²  Peng Liu³  Xinyuan Qian³  Jianwu Zhang⁴  Yuntao Song⁴  Liang Wang⁴  Jianjun Huang⁴  Xin Mao⁵ 

[1]Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China

[2]Corresponding author.

[3]College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

[4]Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

[5]Key Laboratory of Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

关键词: CuCrZr alloy;    Johnson-Cook model;    Dynamic compressive behavior;    Plasma facing components;   

DOI  :  

来源: DOAJ

【 摘 要 】

CuCrZr alloy has been acknowledged as one of the most promising candidate materials for the heat sink of plasma facing components in nuclear fusion devices with its excellent thermal conductivity and specific mechanical strength. For the safety concern, it is vital to provide appropriate safety assessment on these mechanical structures with CuCrZr alloy, such as divertor and blanket, under high strain rate loading conditions like displacement events, disruption, and so on. In this work, the dynamic compressive behavior of the CuCrZr alloy over wide range of strain rates and temperatures was investigated using the split Hopkinson pressure bar technique. Based on the experiment results, a constitutive equation is built by using Johnson-Cook model to describe the dynamical property of CuCrZr alloy. However, the results indicated that the influences of the strain, strain rate and temperature on the dynamic behavior are not independent. Therefore, a modified Johnson-Cook model was further developed to take the coupled effects of strain, strain rate and temperature into account. Compared with the original Johnson-Cook model, the modified Johnson-Cook model calculated results show good agreement with the experimental data.

【 授权许可】

Unknown