THE FAILURE OF LOCAL SHARP-DENTED 6061-T6 ALUMINUM ALLOY TUBES WITH DIFFERENT DIAMETER-TO-THICKNESS RATIOS UNDER CYCLIC BENDING | ||||
The International Conference on Applied Mechanics and Mechanical Engineering | ||||
Article 34, Volume 18, 18th International Conference on Applied Mechanics and Mechanical Engineering., April 2018, Page 1-17 PDF (1.3 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/amme.2018.34973 | ||||
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Authors | ||||
K. L. Lee1; J. T. Lin2; W. F. Pan3 | ||||
1Professor, Dept. of Innovative Design and Entrepreneurship Management, Far East University, Tainan, Taiwan. | ||||
2Graduate student, Dept. of Engineering Science, National Cheng Kung University, Tainan, Taiwan. | ||||
3Professor, Dept. of Engineering Science, National Cheng Kung University, Tainan, Taiwan. | ||||
Abstract | ||||
ABSTRACT In this study, the failure of local sharp-dented 6061-T6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending are investigated. Different diameter-to-thickness ratios of 16.5, 31.0 and 60.0 were considered. The dent depths of tubes were considered from very small to approximately 0.6 times the tube’s wall thickness. From the experimental ovalization-curvature relationship, it exhibited an increasing and ratcheting manner when the number of cycles increased. The larger dent depth led to more asymmetrical ovalization-curvature relationship and the greater increase of the ovalization. Furthermore, for a certain diameter-tothickness ratio, five unparallel straight lines corresponding to five different dent depths were found for the controlled curvature-number of cycles required to produce failure relationship on a log-log scale. Finally, a theoretical model was proposed for simulating the aforementioned relationship. Through comparison with the experimental data, the theoretical model can properly simulate the experimental findings. | ||||
Keywords | ||||
Different Diameter-to-thickness Ratios; Local Sharp-dented 6061-T6 Aluminum Alloy Tubes; Cyclic Bending; Curvature; Ovalization; Number of Cycles Required to Produce Failure | ||||
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