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,2019,48(12):3870~3875.[Zhao Kuan,Xue He,Zhao Lingyan,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.]
随机因素对镍基合金应力腐蚀裂尖力学特性的影响
投稿时间:2018-06-18  修订日期:2018-07-19
中文关键词:  镍基合金  应力腐蚀开裂  拉丁超立方抽样  不确定性
基金项目: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)
中文摘要:
      镍基合金的应力腐蚀开裂是核电站一回路中最重要的潜在安全隐患之一,考虑物理参数的随机性,基于氧化膜破裂理论,研究了镍基合金应力腐蚀裂尖力学特性的分散性规律。为了提高随机参数数值分析的效率,结合MATLAB和ABAQUS子模型技术的优点,完成了MATLAB对ABAQUS 的二次开发,将有限元数值模拟和拉丁超立方抽样方法相结合,获得了弹性模量、屈服强度等随机参数对应力腐蚀裂尖氧化膜和基体金属区域应力应变的影响规律,并验证了方法的可行性。结果表明,随机性的影响不容忽略,屈服应力的随机性对裂尖应力的分散性影响最大,而弹性模量的随机性对裂尖塑性应变分散性的影响最为显著。
Influence of Randomness on Mechanical Properties at Tip of Stress Corrosion Cracking in Nickel-based Alloys
英文关键词:nickel-based alloy  stress corrosion cracking  Latin hypercube sampling  uncertainty
英文摘要:
      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.
作者单位E-mail
赵宽 机械工程学院 xinkuan123@126.com 
薛河 机械工程学院  
赵凌燕 School of Science,Xi’an University of Science Technology,Xi’an  
杨富强 School of Science,Xi’an University of Science Technology,Xi’an  
摘要点击次数: 60
全文下载次数: 72
查看全文  查看/发表评论  
关闭