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| 镍基单晶平板缺口有限元分析 | |
| 引用本文： | 彭鸿博,赵萍,刘鑫.镍基单晶平板缺口有限元分析[J].科技通报,2012,28(2):158-160. |
| 作者姓名： | 彭鸿博 赵萍 刘鑫 |
| 作者单位： | 1. 中国民航大学航空工程学院,天津,300300 2. 南车株洲电力机车研究所有限公司,湖南株洲,412001 3. 湖南山河航空动力机械股份有限公司,湖南长沙,410100 |
| 摘 要： | 基于晶体塑性理论并利用有限元方法对镍基单晶含缺口平板的应力应变场进行了分析,研究了外载荷、厚度和缺口半径等对平板缺口部分的等效应力、最大分切应力和应变的影响。结果表明:外载荷的变化不会影响三变量的分布规律,各变量随载荷的增加都呈增大的趋势;厚度和缺口半径是影响缺口尖端应力应变状态的两个重要因素,厚度增大和缺口半径减小都会增加缺口尖端的应力应变集中程度,且应力最大值位置不随厚度发生变化,但随缺口半径的减少其位置也随之向远离缺口尖端方向移动。最后从理论上对缺口的应力应变进行了推导,其结论与有限元分析结果基本相符。 |
| 关 键 词： | 镍基单晶 有限元分析 外载荷 厚度 缺口半径 |
FEM Analysis of Nickel Single Crystal Flat Slab with Crackles |
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| PENG Hongbo , ZHAO Ping , LIU Xin.FEM Analysis of Nickel Single Crystal Flat Slab with Crackles[J].Bulletin of Science and Technology,2012,28(2):158-160. | |
| Authors: | PENG Hongbo ZHAO Ping LIU Xin |
| Institution: | 1.College of Aeronautical Engineering,CAUC,Tianjin 300300,China; 2.CSR Zhuzhou Institute CO.LTD,Zhuzhou 412001,China; 3 Hunan Sunward Aero Dynamic Mechanism CO.LTD,Changsha 410100,China) |
| Abstract: | Stress and strain field of the flat slab with crackles was analyzed by FEM analysis based on crystal plastic theory,the influence of loading,thickness and crack radius on von-misses,max shear stress and strain was investigated.Results showed that different loading unable to alter the distribution of three variables,which increase with increscent loading;thickness and crack radius are two important factor to crack tip stress and strain state,the concentration degree of stress and strain is worst with the increase of thickness and the decrease of radius,the location of max stress value keeps away from crack tip with the decrease of radius and without thickness.The analysis results of stress and strain field was in good agreement with FEM. |
| Keywords: | nickel-base single crystal FEM analysis loading crack radius thickness |
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