Failure life estimation of sharp-notched circular tubes with different notch depths under cyclic bending

Kuo Long Lee, Kao Hua Chang, Wen Fung Pan

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

In this paper, the response and failure of sharp-notched 6061-T6 aluminum alloy circular tubes with five different notch depths of 0.4, 0.8, 1.2, 1.6 and 2.0 mm subjected to cyclic bending were experimentally and theoretically investigated. The experimental moment-curvature relationship exhibits an almost steady loop from the beginning of the first cycle. And, the notch depth has almost no influence on its relationship. However, the ovalization-curvature relationship exhibits a symmetrical, increasing, and ratcheting behavior as the number of cycles increases. In addition, a higher notch depth of a tube leads to a more severe unsymmetrical trend of the ovalization-curvature relationship. Focusing on the aforementioned relationships, the finite element software ANSYS was used to continue the related theoretical simulation. Furthermore, the five groups of tubes tested have different notch depths, from which five unparallel straight lines can be observed from the relationship between the controlled curvature and the number of cycles required to produce failure in the log-log scale. Finally, a failure model was proposed to simulate the aforementioned relationship. Through comparison with the experimental data, the proposed model can properly simulate the experimental data.

原文English
頁(從 - 到)387-404
頁數18
期刊Structural Engineering and Mechanics
60
發行號3
DOIs
出版狀態Published - 2016 十一月 10

All Science Journal Classification (ASJC) codes

  • 土木與結構工程
  • 建築與營造
  • 材料力學
  • 機械工業

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