The response and failure of local sharp-cut 6061-t6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending

Kuo Long Lee, Wei Yi Huang, Wen-Fung Pan

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Abstract

In this paper, the response and failure of local sharp-cut 6061-T6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending were studied. Three different diameter-to-thickness ratios of 16.5, 31.0 and 60.0 were considered. The experimental moment-curvature relationship rapidly became a steady loop from the beginning of the first bending cycle. Moreover, the cut depth had almost no influence on the moment-curvature relationship. As for the ovalization-curvature relationship, when the number of cycles increased, it exhibited an increasing and ratcheting manner. It was seen that the greater the depth of the cut, the more asymmetrical ovalization-curvature relationship and the greater the increase of the ovalization. Furthermore, for a certain diameter-to-thickness ratio, five unparallel straight lines corresponding to five different cut 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 in this study for simulating aforementioned relationship. It was found that the experimental and analytical data agreed well.

Original languageEnglish
Pages (from-to)27-40
Number of pages14
JournalChung Cheng Ling Hsueh Pao/Journal of Chung Cheng Institute of Technology
Volume47
Issue number1
Publication statusPublished - 2018 May 1

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thickness ratio
aluminum alloys
tubes
curvature
cycles
moments

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "The response and failure of local sharp-cut 6061-t6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending",
abstract = "In this paper, the response and failure of local sharp-cut 6061-T6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending were studied. Three different diameter-to-thickness ratios of 16.5, 31.0 and 60.0 were considered. The experimental moment-curvature relationship rapidly became a steady loop from the beginning of the first bending cycle. Moreover, the cut depth had almost no influence on the moment-curvature relationship. As for the ovalization-curvature relationship, when the number of cycles increased, it exhibited an increasing and ratcheting manner. It was seen that the greater the depth of the cut, the more asymmetrical ovalization-curvature relationship and the greater the increase of the ovalization. Furthermore, for a certain diameter-to-thickness ratio, five unparallel straight lines corresponding to five different cut 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 in this study for simulating aforementioned relationship. It was found that the experimental and analytical data agreed well.",
author = "Lee, {Kuo Long} and Huang, {Wei Yi} and Wen-Fung Pan",
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AU - Lee, Kuo Long

AU - Huang, Wei Yi

AU - Pan, Wen-Fung

PY - 2018/5/1

Y1 - 2018/5/1

N2 - In this paper, the response and failure of local sharp-cut 6061-T6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending were studied. Three different diameter-to-thickness ratios of 16.5, 31.0 and 60.0 were considered. The experimental moment-curvature relationship rapidly became a steady loop from the beginning of the first bending cycle. Moreover, the cut depth had almost no influence on the moment-curvature relationship. As for the ovalization-curvature relationship, when the number of cycles increased, it exhibited an increasing and ratcheting manner. It was seen that the greater the depth of the cut, the more asymmetrical ovalization-curvature relationship and the greater the increase of the ovalization. Furthermore, for a certain diameter-to-thickness ratio, five unparallel straight lines corresponding to five different cut 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 in this study for simulating aforementioned relationship. It was found that the experimental and analytical data agreed well.

AB - In this paper, the response and failure of local sharp-cut 6061-T6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending were studied. Three different diameter-to-thickness ratios of 16.5, 31.0 and 60.0 were considered. The experimental moment-curvature relationship rapidly became a steady loop from the beginning of the first bending cycle. Moreover, the cut depth had almost no influence on the moment-curvature relationship. As for the ovalization-curvature relationship, when the number of cycles increased, it exhibited an increasing and ratcheting manner. It was seen that the greater the depth of the cut, the more asymmetrical ovalization-curvature relationship and the greater the increase of the ovalization. Furthermore, for a certain diameter-to-thickness ratio, five unparallel straight lines corresponding to five different cut 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 in this study for simulating aforementioned relationship. It was found that the experimental and analytical data agreed well.

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