| 柔度方程在COD法测量疲劳裂纹长度中的应用 |
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| 引用本文： | 牛康民,陈美英,胡元凯. 柔度方程在COD法测量疲劳裂纹长度中的应用[J]. 实验力学, 1988, 3(3) |
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| 作者姓名： | 牛康民 陈美英 胡元凯 |
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| 作者单位： | 北京航空材料研究所，北京航空材料研究所，北京航空材料研究所 |
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| 摘 要： | 简介了COD技术测量裂纹长度的理论标定式.通过一套高精度的柔度测量系统,对GC4高强钢的两和热处理制度的CT试样进行了裂纹测量标定。调整柔度——裂纹表达式中的弹性模量E′,获得了高精度的实验柔度——裂纹(即BE′V/P-a/W)标定曲线.由实验观察提出了对BEV/P取对数的多项式标定函数,它此广为采用的以1/[(BEV/P)1/2+1]为项的多项式简单,无论是与理论计算值还是与实验值进行对比,前者均优于后者。
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| 关 键 词： | COD 疲劳裂纹 柔度测量 |
Application of Compliance Expressions for Measuring Fatigue Crack Length By COD Techniques |
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| Niu Kangmin Chen Meiying Hu Yuankai. Application of Compliance Expressions for Measuring Fatigue Crack Length By COD Techniques[J]. Journal of Experimental Mechanics, 1988, 3(3) |
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| Authors: | Niu Kangmin Chen Meiying Hu Yuankai |
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| Abstract: | Compliance expression used for measuring fatigue crack lengths are briefly described. Crack lengths of CT specimen, made of Gc4 high strength steel and heat treated in two different processes, are measured by a set of high precision COD measurement equipment. The compliance expression by Saxena et al is found to be in excellent agreement with experimental results but complicate. In this paper, a new form of compliance expression, in which log (BEV/P) is used instead of BEV/P, is proposed, and it seems that this new expression is superior. |
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| Keywords: | COD fatigue crack compliance measurement. |
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