孔边角裂纹扩展特性分析

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1994, Vol. 15 ›› Issue (3): 372-375.

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ANALYSIS OF FATIGUE CRACK-GROWTH BEHAVIOUR IN CORNER CRACKS AT HOLES

Li Zhengneng, He Youqing

5th Departmant, Beijing University of Aeronautics and Astronautics,Beijing,100083

Received:1993-08-02 Revised:1993-11-04 Online:1994-03-25 Published:1994-03-25

Abstract

Abstract: Fatigue crack-growth rates and lives for corner cracks at holes in three-dimensional bodies are studied by using the two dlinensional(2-D)crack growth analysis approach that is modified to account for crack-closure hehavior The 3-D crack growth analysis approach as- sumes that growth in the two principal directions of corner cracks at holes can be characterized by the stress intensity factors at the extreme points of each direction. The crack configurations are subjected to constant-amplitude fatigue loading under either remote tension. The predicted crack-growth rates and crack-growth lives for aluminum alloys 2124T851 and alloy-steels 30CrMnSiNi2A agree well with test data.

Key words: cracks propagation, stress intensity factors, holes

CLC Number:

Li Zhengneng;He Youqing. ANALYSIS OF FATIGUE CRACK-GROWTH BEHAVIOUR IN CORNER CRACKS AT HOLES[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1994, 15(3): 372-375.

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ANALYSIS OF FATIGUE CRACK-GROWTH BEHAVIOUR IN CORNER CRACKS AT HOLES

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