LY12CZ、LC4CS铝合金板材疲劳裂纹扩展特性研究

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1993, Vol. 14 ›› Issue (3): 215-218.

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A STUDY ON STATISTICAL NATURE OF FATIGUE CRACK GORWTH FOR THE LY12CZ AND LC4CS ALLOYS ALUMINUM

Liu Xiu-li, Lu Fu-mei, Wu Xiao-feng

Box 2, Yao Country, Shaan Xi, 727100

Received:1992-08-15 Revised:1992-10-21 Online:1993-03-25 Published:1993-03-25

Abstract

Abstract: Fatigue Tack growth tests for more than sixty specimens have been completed, which are made from LY12CZ and LC4CS with thickness of 5mm, 4mm, 3mm, 2mm respectively. The P-da / dN-ΔK curves are obtained by using Weibnll distribution under a given confidence. The parameters for Paris formula with different reliabilities are also obtained. Furthermore a comparison is made to the statistical nature of fatigue crack propagation for the same material with different thicknesses and the same reliability. These results can be used as an important reference in durability damage tolerance design and reliability design of aircraft structures.

Key words: reliability, fatigue crack growth, statistical nature, Weibull distribution

Liu Xiu-li;Lu Fu-mei;Wu Xiao-feng. A STUDY ON STATISTICAL NATURE OF FATIGUE CRACK GORWTH FOR THE LY12CZ AND LC4CS ALLOYS ALUMINUM[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1993, 14(3): 215-218.

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A STUDY ON STATISTICAL NATURE OF FATIGUE CRACK GORWTH FOR THE LY12CZ AND LC4CS ALLOYS ALUMINUM

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