| 四点弯曲U形切口应力集中系数的数值分析 |
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| 引用本文： | 刘裕,;刘小妹,;胡磊,;夏毓东.四点弯曲U形切口应力集中系数的数值分析[J].上海工程技术大学学报,2014(2):141-144. |
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| 作者姓名： | 刘裕 ;刘小妹 ;胡磊 ;夏毓东 |
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| 作者单位： | [1]上海工程技术大学机械工程学院,上海201620; [2]同济大学机械与能源工程学院,上海200092 |
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| 基金项目： | 上海市大学生创新项目（B-8906-13-01008）;上海工程技术大学大学生创新项目（A-0800-13-02118） |
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| 摘 要： | 四点弯曲实验是适用陶瓷材料断裂韧性的测试方法和标准,可以研究具有切口脆性材料构件的断裂.借助于ANSYS有限元分析,得到了不同的切口尖锐度(切口深度与切口根部半径的比值a/ρ)和宽度比值(试样宽度和切口深度的比值w/a)下,单边U形切口四点弯曲的应力集中系数.利用Matlab软件拟合不同宽度比值,得到四点弯曲U形切口应力集中系数与切口尖锐度的关系式,为四点弯曲U形切口的断裂分析提供了理论基础.
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| 关 键 词： | U形切口 应力集中系数 四点弯曲 有限元分析 |
Numerical Analysis of Stress Concentration Factors for U-Shaped Notch with Four-Point Bending |
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| Affiliation: | LIU Yu ,LIU Xiaomei, HU Lei, XIA Yudong (1. College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China 2. School of Mechanical Engineering, Tongji University, Shanghai 200092, China ) |
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| Abstract: | Four point bending（FPB） is a test method and standard used in fracture toughness of ceramic materials. Based on the finite element analysis of ANSYS, a wide range of notch acuity ratio （ratio of the notch depth to the notch root radius alp） and notch width ratio（ratio of the specimen width to the notch depth w/a）were obtained as well as SCF of single-edged U-notch under FPB. Fitted by Matlab for different width ratios, the function of SCF and notch acuity ratio for U-notched plates under FPB was got, which can provide a theoretical foundation for the fracture analysis of U-notched bending under FPB. |
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| Keywords: | U-notch stress concentration factor four-point bending finite element analysis |
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