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赵宽,薛河,赵凌燕,杨富强.随机因素对镍基合金应力腐蚀裂尖力学特性的影响[J].稀有金属材料与工程(英文),2019,48(12):3870~3875.[Zhao Kuan,Xue He,Zhao Lingyan and Yang Fuqiang.Influence of Randomness on Mechanical Properties at Tip of Stress Corrosion Cracking in Nickel-based Alloys[J].Rare Metal Materials and Engineering,2019,48(12):3870~3875.]
Influence of Randomness on Mechanical Properties at Tip of Stress Corrosion Cracking in Nickel-based Alloys
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Received:June 18, 2018  Revised:July 19, 2018
Key words: nickel-based alloy  stress corrosion cracking  Latin hypercube sampling  uncertainty
Foundation item:国家自然科学基金(No. 51811530311, 11502195),陕西省教育厅科研计划项目(No. 17JK0508),陕西省自然基础研究计划项目(NO. 2018JQ5193)
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Zhao Kuan,Xue He,Zhao Lingyan and Yang Fuqiang  
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      Stress corrosion cracking (SCC) in nickel-based alloys is one of the most important potential safety hazards in primary circuit of nuclear power plants. Considering the randomness of physical parameters and based on the theory of oxide film rupture, the dispersion law of mechanical properties at SCC tip of nickel-bases alloys is studied. To improve the efficiency of numerical analysis with random parameters, combining with the advantages of MATLAB and sub-model technology of ABAQUS, MATLAB is employed in the secondary development for ABAQUS. With the help of finite element numerical simulation and Latin hypercube sampling method, Effect of random parameters such as Young’s modulus, yield strength on the stress and strain of the oxide film region and the base metal region is investigated. Meanwhile, the feasibility of the method is verified. The results show that the influence of randomness should not be ignored, the randomness of yield stress has the greatest influence on the dispersion of stress at SCC tip, and the randomness of Young’s modulus has the most significant effect on the plastic strain dispersion at SCC tip.