裂纹扩展阻力曲线与试样厚度关系

杨继运; 张行; 张珉

裂纹扩展阻力曲线与试样厚度关系

1.
北京航空航天大学飞行器设计与应用力学系, 北京 100083
2. 中国航天科工集团三十一研究所, 北京 100074

基金项目: 教育部博士点基金资助项目(1999000607)

详细信息

作者简介:
杨继运(1975-),男,山东定陶人,博士生, yhahay@sina.com.cn.

中图分类号: O 3461
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- 被引次数: 0
出版历程
- 收稿日期: 2002-05-09
- 网络出版日期: 2003-07-31

Research on relation between crack extension resistance curve and sample thickness

1.
Dept. of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2. 31st Research Institute, China Aerospace Science and Industry Corporation, Beijing 100074, China

摘要

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.
- 裂纹扩展 /
- 阻力曲线 /
- 曲线拟合
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.
- crack propagation /
- resistance curves /
- curve fitting

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参考文献(1)

[1] Broek D. Artificial slow crack growth under constant stress-The R curve concept in plane stress[J] Engineering Fracture Mechanics, 1973(5):45~53 [2] Yan Cheng, Mai Yiuwing. Numerical investigation on stable crack growth in plane stress[J] International Journal of Fracture, 1998, 91:117~130 [3] Fett T, Munz D, Geraghty R D, et al. Influence of specimen geometry and relative crack size on the R-curve[J] Engineering Fracture Mechanics, 2000, 66:375~386 [4] 杨继运, 张行. 材料断裂韧度与试样厚度关系研究[J] 机械强度,2003,25(1):76~80 Yang Jiyun, Zhang Xing. Research on the relation between fracture toughness and sample thickness[J] Journal of Mechanical Strength, 2003,25(1):76~80 (in Chinese) [5] Zhao J, Zhang X. On the process zone of a quasi-static growing tensile crack with power-law elastic-plastic damage[J] International Journal of Fracture, 2001, 108:383~395 [6] 杨继运, 张行. 裂纹扩展阻力曲线与剩余强度关系的理论研究[J] 机械强度,2003,25(3):334~339 Yang Jiyun, Zhang Xing. Mathematical research on the relation between resistance curve of crack growth and residual strength[J] Journal of Mechanical Strength, 2003,25(3):334~339(in Chinese) [7] 吴学仁.飞机结构金属材料力学性能手册[M] 第二卷. 北京:航空工业出版社,1996 Wu Xueren. Handbook of mechanical properties of aircraft structural metals[M] Vol. 2. Beijing:Aviation Industry Press, 1996(in Chinese)

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