| 载荷水平对HCF寿命分散性影响的有限元模拟 |
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| 引用本文： | 杨晓光,苗国磊,韩世伟,石多奇.载荷水平对HCF寿命分散性影响的有限元模拟[J].航空动力学报,2016,31(12):2928-2932. |
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| 作者姓名： | 杨晓光 苗国磊 韩世伟 石多奇 |
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| 作者单位： | 北京航空航天大学 能源与动力工程学院, 北京 100191;先进航空发动机协同创新中心, 北京 100191,北京航空航天大学 能源与动力工程学院, 北京 100191,北京航空航天大学 能源与动力工程学院, 北京 100191,北京航空航天大学 能源与动力工程学院, 北京 100191;先进航空发动机协同创新中心, 北京 100191 |
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| 摘 要： | 给出了基于晶体塑性理论的高循环疲劳（HFC）寿命分散性有限元模拟方法.针对典型钛合金TC4的微结构特征，采用Voronoi方法建立其晶粒模型，建立钛合金晶体塑性本构方程，计算模拟了应力水平对疲劳寿命分散性的影响，给出表征疲劳寿命分散性的参数.结果表明：应力水平越低，疲劳寿命越长，疲劳寿命的分散性越大，与实验规律一致.
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| 关 键 词： | 钛合金 高周疲劳 微结构 寿命分散性 晶体塑性理论 |
| 收稿时间： | 2015/5/23 0:00:00 |
Finite element simulation for effect of loading on HCF life scatter |
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| YANG Xiao-guang,MIAO Guo-lei,HAN Shi-wei and SHI Duo-qi.Finite element simulation for effect of loading on HCF life scatter[J].Journal of Aerospace Power,2016,31(12):2928-2932. |
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| Authors: | YANG Xiao-guang MIAO Guo-lei HAN Shi-wei and SHI Duo-qi |
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| Affiliation: | School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China,School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China,School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China and School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China |
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| Abstract: | The finite element simulation method of high cycle fatigue(HCF) life scatter based on crystal plasticity theory was introduced. According to the features of microstructure of typical titanium alloy TC4, the grains model was established by Voronoi method. Combining the crystal plasticity constitutive equations of titanium alloy, the simulation of the effect of stress level on the fatigue life scatter was performed. The parameter of fatigue life dispersion was given. Results show that,the fatigue life is longer and the life is more dispersed as the loading decreases. |
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| Keywords: | Titanium alloy high cycle fatigue microstructure life scatter crystal plasticity theory |
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