| 裂纹扩展阻力曲线与试样厚度关系 |
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| 引用本文： | 杨继运,张行,张珉.裂纹扩展阻力曲线与试样厚度关系[J].北京航空航天大学学报,2003,29(7):575-578. |
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| 作者姓名： | 杨继运 张行 张珉 |
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| 作者单位： | 1.北京航空航天大学 飞行器设计与应用力学系, 北京 100083 |
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| 基金项目： | 教育部博士点基金资助项目 ( 19990 0 0 60 7) |
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| 摘 要： | 在有关裂纹扩展理论阻力曲线研究的基础上,给出了阻力曲线与试样厚度关系的数学表达式.利用少量试验结果,根据最小二乘方法即可确定表达式中的参量.通过这一表达式,可以计算任意厚度下的阻力曲线方程,从而获得该厚度对应的阻力曲线.这一数学表达式得到了试验结果的验证,并可补充现有手册中试验数据之不足.
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| 关 键 词： | 裂纹扩展 阻力曲线 曲线拟合 |
| 文章编号： | 1001-5965(2003)07-0575-04 |
| 收稿时间： | 2002-05-09 |
| 修稿时间： | 2002年5月9日 |
Research on relation between crack extension resistance curve and sample thickness |
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| Yang Jiyun,Zhang Xing,Zhang Min.Research on relation between crack extension resistance curve and sample thickness[J].Journal of Beijing University of Aeronautics and Astronautics,2003,29(7):575-578. |
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| Authors: | Yang Jiyun Zhang Xing Zhang Min |
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| Institution: | 1.Dept. of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China2. 31st Research Institute, China Aerospace Science and Industry Corporation, Beijing 100074, China |
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| Abstract: | A mathematical formula for the relation between resistance curve of crack extension and sample thickness was obtained in fracture mechanics, based on the theoretical resistance curve of crack extension which was provided in the previous work. Some parameters in the formula were determined by the least square method. The resistance curve equation of specimen with arbitrary sample thickness can be calculated by this method. The mathematical expression is verified by test results and additional data may be provided by this expression for complementing the current handbook. |
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| Keywords: | crack propagation resistance curves curve fitting |
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