核燃料裂变气体辐照肿胀的相场模拟与分析

采用修正的Cahn-Hilliard方程研究辐照下核材料中气泡微结构演化过程，采用基于经典形核理论的形核算法模拟空洞形核过程，分析微结构对核材料力学性质的影响，着重考察了气体辐照肿胀应变的演化规律．分析了不同辐照强度下气泡密度和气体辐肿胀应变的演化规律，并与实验结果进行对比．

Phase Field Simulation and Analysis of Nuclear Fission Gas Irradiation Swelling

The void and bubble formation in materials under irradiations was simulated by modified Cahn-Hilliard equations with vacancy and gas atom generation source terms. A nucleation algorithm based on the classical nucleation theory was employed in this model. Gas bubble density and irradiation swelling strain were studied under different damage rate. Phase-field simulation results are compared with the experiment results.