The Influence of Notch Depth on the  Response of Local Sharp-Notched Circular Tubes under Cyclic Bending

Lee, Kuo-Long; Meng, Ching-Hsun; Pan, Wen‐Fung

doi:10.4236/jamp.2014.26040

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…In addition, higher values of for sharp-notched SUS304 stainless steel tubes led to more severe unsymmetrical trends in the Δ ⁄ -⁄ curve. This phenomenon of Δ ⁄ -⁄ curves is similar to that for local sharp-notched SUS304 stainless steel tubes subjected to cyclic bending [31]. But the unsymmetrical trend of Δ ⁄ -⁄ curves for local sharp-cut 6061-T6 aluminum alloy tubes is more significant than that for local sharp-notched SUS304 SUS304 stainless steel tubes.…”

Section: Finite Element Analysissupporting

confidence: 61%

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Finite element analysis on the response of 6061-T6 aluminum alloy tubes with a local sharp cut under cyclic bending

Chung

Lee

Pan³

2016

J. vibroeng.

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In this paper, the finite element software ANSYS Workbench 14.0 is used to analyze the moment-curvature and ovalization-curvature relationships of 6061-T6 aluminum alloy tubes with a local sharp cut under curvature-controlled symmetrical cyclic bending. The cut depths of 0.4, 0.8, 1.2, 1.6 and 2.0 mm were considered. The experimental moment-curvature relationship exhibited an almost steady loop from the beginning of the first cycle; the cut depth had almost no influence on the curves. Moreover, the ovalization-curvature curve increased in an increasing, unsymmetrical and ratcheting manner with the number of bending cycles. Large cut depths resulted in larger ovalization of the tube cross-section. The ANSYS analysis was compared with the experimental finding. The simulated results exhibited close correspondence to those obtained from the experiments.

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Section: Finite Element Analysissupporting

confidence: 61%

“…1(b)), the response of a local sharp notch tube under cyclic bending should be different from that of a circumferential sharp notch tube under cyclic bending. Therefore, Lee et al [31] investigated the response of local sharp-notched circular tubes with different notch depths subjected to cyclic bending.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis on the response of 6061-T6 aluminum alloy tubes with a local sharp cut under cyclic bending

Chung

Lee

Pan³

2016

J. vibroeng.

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Effects of Notch Depth and Direction on Stability of Local Sharp-Notched Circular Tubes Subjected to Cyclic Bending

Lee

Chang

Pan

2018

Int. J. Str. Stab. Dyn.

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Cyclic bending of tubes leads to progressive ovalization of the tube cross-section, and persistent cycling causes catastrophic buckling of the tube. This paper presents the response and stability of SUS304 stainless steel tubes with local sharp-notched depths of 0.2, 0.4, 0.6, 0.8, and 1.0[Formula: see text]mm and notch directions of 0[Formula: see text], 30[Formula: see text], 60[Formula: see text], and 90[Formula: see text] under cyclic bending. The experimental results reveal that the moment–curvature relationship first exhibits cyclic hardening and then a steady loop after a few cycles. Because the notches are small and localized, notch depth and direction show minimal influence on the moment–curvature relationship. In contrast, the ovalization–curvature relationship demonstrates an increasing and ratcheting pattern along with the bending cycle, whereas notch depth and direction show a strong influence on this relationship. Finite-element analysis via ANSYS is used to simulate the moment–curvature and ovalization–curvature relationships, and an empirical model is proposed to simulate the relationship between the controlled curvature and number of cycles required to ignite buckling. The experimental and analytical data agree well with each other.

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

Lee¹,

Chang²,

Pan³

2016

Structural Engineering and Mechanics

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The Influence of Notch Depth on the Response of Local Sharp-Notched Circular Tubes under Cyclic Bending

Cited by 3 publications

References 13 publications

Finite element analysis on the response of 6061-T6 aluminum alloy tubes with a local sharp cut under cyclic bending

Finite element analysis on the response of 6061-T6 aluminum alloy tubes with a local sharp cut under cyclic bending

Effects of Notch Depth and Direction on Stability of Local Sharp-Notched Circular Tubes Subjected to Cyclic Bending

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

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