In this paper, a crystal plasticity model considering the irradiation effect based on the thermal activation theory is established. The evolutions of screw dislocations, edge dislocations, and stacking fault tetrahedrals (SFTs) (induced by irradiation) are included into the model. The interactions between dislocations and irradiation-induced SFTs are also considered. The constitutive model is numerically implemented on the ABAQUS platform through UMAT subroutine and applied to study the irradiation effect on the mechanical behavior of pure copper. The mechanical properties of single and polycrystalline copper are studied, and the simulation results show that the constitutive model can properly predict the mechanical behavior of irradiated pure copper. Especially for polycrystalline copper, the simulation results are in good agreement with the experimental data.

中文翻译：

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FCC金属力学行为的辐射效应晶体可塑性模型

本文基于热活化理论建立了考虑辐照效应的晶体可塑性模型。模型中包括了螺钉位错，边缘位错和堆垛层错四面体（SFT）（由辐射引起）的演变。还考虑了位错与辐射诱导的SFT之间的相互作用。本构模型通过UMAT子程序在ABAQUS平台上数值实现，并用于研究辐照对纯铜力学行为的影响。研究了单晶铜和多晶铜的力学性能，仿真结果表明，本构模型可以正确预测辐照纯铜的力学行为。特别是对于多晶铜，