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.
|Number of pages||14|
|Journal||Chung Cheng Ling Hsueh Pao/Journal of Chung Cheng Institute of Technology|
|Publication status||Published - 2018 May|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)