Experimental and finite element investigation on the behavior of local sharp-notched circular tubes under cyclic bending

Kuo Long Lee, Chen Cheng Chung, Wen-Fung Pan

Research output: Contribution to journalArticle

Abstract

In this paper, the mechanical behavior of local sharp-notched circular tubes under cyclic bending was experimentally and theoretically investigated. The material of the tubes was SUS304 stainless steel. The local sharpnotched depths included: 0.2, 0.4, 0.6, 0.8 and 1.0 mm, and the local sharpnotched directions included: 0°, 15°, 30°, 45°, 60°, 75° and 90°. According to the experimental result, the moment-curvature curve exhibits cyclic hardening and becomes stable after a few cycles. The notch depth and direction have almost no influence on the moment-curvature relationship. The ovalizationcurvature curve shows an increasing and ratcheting manner with the number of cycles. The notch depth increases, the unsymmetrical phenomenon of the ovalization-curvature relationship becomes more obvious and the ovalization increases faster. In addition, the ovalization- curvature relationship becomes more symmetrical and the ovalization increases slower when the notch direction increases. Finally, finite element software ANSYS was used to simulate the moment-curvature and ovalization-curvature relationships. Although the experimental and theoretical results had some differences, but both trends were similar.

Original languageEnglish
Pages (from-to)187-196
Number of pages10
JournalJournal of Technology
Volume32
Issue number3
Publication statusPublished - 2017 Sep 1

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Hardening
Stainless steel

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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title = "Experimental and finite element investigation on the behavior of local sharp-notched circular tubes under cyclic bending",
abstract = "In this paper, the mechanical behavior of local sharp-notched circular tubes under cyclic bending was experimentally and theoretically investigated. The material of the tubes was SUS304 stainless steel. The local sharpnotched depths included: 0.2, 0.4, 0.6, 0.8 and 1.0 mm, and the local sharpnotched directions included: 0°, 15°, 30°, 45°, 60°, 75° and 90°. According to the experimental result, the moment-curvature curve exhibits cyclic hardening and becomes stable after a few cycles. The notch depth and direction have almost no influence on the moment-curvature relationship. The ovalizationcurvature curve shows an increasing and ratcheting manner with the number of cycles. The notch depth increases, the unsymmetrical phenomenon of the ovalization-curvature relationship becomes more obvious and the ovalization increases faster. In addition, the ovalization- curvature relationship becomes more symmetrical and the ovalization increases slower when the notch direction increases. Finally, finite element software ANSYS was used to simulate the moment-curvature and ovalization-curvature relationships. Although the experimental and theoretical results had some differences, but both trends were similar.",
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Experimental and finite element investigation on the behavior of local sharp-notched circular tubes under cyclic bending. / Lee, Kuo Long; Chung, Chen Cheng; Pan, Wen-Fung.

In: Journal of Technology, Vol. 32, No. 3, 01.09.2017, p. 187-196.

Research output: Contribution to journalArticle

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