LY12CZ铝合金干涉螺接件微动损伤防护技术

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1991, Vol. 12 ›› Issue (2): 68-72.

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A STUDY ON THE EFFECTIVELY PROTECTIVE MEASURE TO PREVENT FRETTING DAMAGE IN LY12CZ LAP JOINTS WITH INTERFERENCE-FIT BOLT

Li Dongzi¹, Wang Jiansheng¹, Zi Fuxiang¹, Chen Gouding¹, Liu Wenbin²

1. Northwestern Polytechnical University;2. Aircraft Structure Strength Research Institute

Received:1990-06-19 Revised:1990-08-15 Online:1991-02-25 Published:1991-02-25

Abstract

Abstract: The effectively protective measure to prevent fretting damage in LY12CZ lap joints with interference-fit bolt is studied. By fractor-graphic analysis method the microcosmic characters, crack sources and crack initiation location of fretting damage are analysed in details. Based on test investigation, the effects on the fatigue life of interference, different types of treatments applied to the faying surface and different manufacture methods applied to holes are discussed. The methods of increasing fatigue life for LY12CZ lap joints with interference-fit bolt are presented. The results of tests show that the cold-extrusion press technique applied to holes is the most effective measure.

Key words: lap joints with inter ference-fit bolt, fretting damage, protective measure, fractor-graphic analysis, fatigue life

Li Dongzi;Wang Jiansheng;Zi Fuxiang;Chen Gouding;Liu Wenbin. A STUDY ON THE EFFECTIVELY PROTECTIVE MEASURE TO PREVENT FRETTING DAMAGE IN LY12CZ LAP JOINTS WITH INTERFERENCE-FIT BOLT[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1991, 12(2): 68-72.

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A STUDY ON THE EFFECTIVELY PROTECTIVE MEASURE TO PREVENT FRETTING DAMAGE IN LY12CZ LAP JOINTS WITH INTERFERENCE-FIT BOLT

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