| 飞机结构细节EIFS分布的研究 |
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| 引用本文： | 李玉民,沈立中,施荣明.飞机结构细节EIFS分布的研究[J].航空学报,1994,15(3):362-365. |
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| 作者姓名： | 李玉民 沈立中 施荣明 |
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| 作者单位： | Li Yumin; Shen Lizhong; Shi RongmingBox 725 of Shengyang，Shengyang，110035 |
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| 摘 要： | 通过结构细节当量初始缺陷尺寸（ＥＩＦＳ）控制方程将各应力水平和参考裂纹尺寸下采样试件的所有裂纹形成时间（ＴＴＣＩ）值转换成ＥＩＦＳ值并组成一个数据总集,然后按三参数Ｗｅｉｂｕｌｌ分布进行拟合即可得到通用的ＥＩＦＳ分布参数。由于样本容量大,提高了拟合优度以及损伤度预测的精确性和可靠性。
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| 关 键 词： | 等价一缺陷 裂纹初始 裂纹扩展 |
A STUDY ON EIFS DISTRIBUTION OF AIRCRAFT STRUCTURE DETAILS |
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| Li Yumin, Shen Lizhong, Shi RongmingBox of Shengyang,Shengyang,.A STUDY ON EIFS DISTRIBUTION OF AIRCRAFT STRUCTURE DETAILS[J].Acta Aeronautica et Astronautica Sinica,1994,15(3):362-365. |
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| Authors: | Li Yumin Shen Lizhong Shi RongmingBox of Shengyang Shengyang |
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| Institution: | Li Yumin, Shen Lizhong, Shi RongmingBox 725 of Shengyang,Shengyang,110035) |
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| Abstract: | improved method for determining the parameters of equivalent initial flaw size(EIFS)distribution is set up in this paper.The time to crack initiation(TTCI)values corre- sponding to gived reference crack size for every specimens in several stress level are obtained. These TTCI values are translatcd into EIFS values bv EIFS master equation. The all EIFS values composed a sample of EIFS population. Then EIFS distribution parameters(α,Qβ,Xu)are de- teimined by fitting above EIFS values based on EIFS distribution function。 Beacause increasing sample capacity,detennined EIFS distribution parameters is more accurate,and predicted dam- age degree ofthe structure is more reliable. |
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| Keywords: | equivalence defects crack initiation crack propagation |
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