Variable amplitude fatigue test of M30 high-strength bolt in bolt-sphere joint grid structures

Bin Qiu; Honggang Lei; Xu Yang; Zichun Zhou; Guoqing Wang

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자료유형: 학술저널

저자정보: Bin Qiu (Taiyuan University of Technology) Honggang Lei (Taiyuan University of Technology) Xu Yang (Taiyuan University of Technology) Zichun Zhou (Taiyuan University of Technology) Guoqing Wang (Taiyuan University of Technology)

저널정보: 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.33 No.3

발행연도: 2019.1

수록면: 433 - 444 (12page)

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Fatigue failure of a grid structure using bolt-sphere joints is liable to occur in a high-strength bolt due to the alternating and reciprocal actions of a suspension crane. In this study, variable amplitude fatigue tests were carried out on 20 40 Cr steel alloy M30 high-strength bolts using an MTS fatigue testing machine, and four cyclic stress amplitude loading patterns, Low-High, High- Low, Low-High-Low, and High-Low-High, were tested. The scanning electron microscope images of bolt fatigue failure due to variable amplitude stress were obtained, and the fractographic analysis of fatigue fractures was performed to investigate the fatigue failure mechanisms. Based on the available data from the constant amplitude fatigue tests, the variable amplitude fatigue life of an M30 high-strength bolt in a bolt-sphere joint was estimated using both Miner's rule and the Corten-Dolan model. Since both cumulative damage models gave similar predictions, Miner's rule is suggested for estimating the variable-amplitude fatigue life of M30 high-strength bolts in a grid structure with bolt-sphere joints; the S-N fatigue curve of the M30 high-strength bolts under variable amplitude loading was derived using equivalent stress amplitude as a design parameter.

#grid structure #bolt-sphere joint #M30 high-strength bolt #variable amplitude fatigue #cumulative fatigue damage #S-N curve

참고문헌 (30)

참고문헌 신청

2010 / ANSI/AISC 360-16, Specification for Structural Steel Buildings / American Institute of Steel Construction

2012 / ASTM E606/E606M-12, Test method for strain-controlled fatigue testing

Chen, S. / 2016 / Principles of Steel Structure Design / Science Press

Corten, H.T / 1956 / Cumulative fatigue damage / Proceedings of the International Conference on Fatigue of Metals

2003 / Eurocode 3, Design of Steel Structures-Part 1.9: Fatigue, CE / European Committee for Standardization

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