Collapse of Sharp-Notched 6061-T6 Aluminum Alloy Tubes Under Cyclic Bending

Chung, Chen Cheng; Lee, Kuo Long; Pan, Wen Chi

doi:10.1142/s0219455415500352

Cited by 10 publications

(11 citation statements)

References 32 publications

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“…Moreover, a larger hole diameter led to a more asymmetrical appearance of the ΔDo/Do- relationship. The ΔDo/Do- relationships revealed an asymmetrical bow shape, which was different from that of the sharp-notched SUS304 stainless steel tubes tested by Lee et al [2] and Lee [3] , and that of the sharp-notched 6061-T6 aluminum alloy tubes tested by Lee et al [5] and Lee et al [6] . In addition, ΔDo/Do continued to increase when the round hole was under tension.…”

Section: Figure (7)contrasting

confidence: 67%

“…Thereafter, Lee et al [4] experimentally examined the response and collapse of sharp-notched SUS304 stainless steel tubes submitted to cyclic bending at three different curvature rates; correlations between notch depth and curvature rate were also included in their study. Chung et al [5] inspected the cyclic bending response and buckling of sharp-notched 6061-T6 aluminum alloy tubes. Later, Lee et al [6] studied the behavior of local sharp-notched 6061-T6 aluminum alloy tubes under cyclic bending.…”

Section: Figure (1): a Schematic Drawing Of A Round-hole Tubementioning

confidence: 99%

“…Because the bending moment was in the z-direction only, the frictionless roller support was fixed to the plane of the central cross-section, and the displacement in the z-direction of this plane was set to zero. Figure (5) demonstrates the loading conditions constructed by ANSYS. According to the movement of the tube-bending machine, the rotation could move freely in the zdirection, thus, the remote displacement in the z-direction was set to be unrestricted.…”

Section: Boundary and Loading Conditions: Figure (4)mentioning

confidence: 99%

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Simulation of the cyclic bending response for 6061-T6 aluminum round-hole tubes

2020

JECET

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In this paper, the simulation of the response for 6061-T6 aluminum alloy round-hole tubes with different hole diameters of 2, 4, 6, 8 and 10 mm subjected to cyclic bending is studied. The experimental results tested by Lee et al. [1] were employed in this study. It can be seen that the moment-curvature relationships showed a closed and stable loop from the first bending cycle. The hole diameters have very small influence on the loop shape. But, the ovalization-curvature relationships depicted an asymmetrical, ratcheting, and bow trend. The hole diameter revealed a strong influence on this relationship. Furthermore, higher hole diameters caused larger tube's ovalizations. Finally, the finite element software ANSYS was employed to analyze the moment-curvature and ovalization-curvature relationships. Through comparison with the experimental data, the ANSYS could properly simulate the experimental findings.

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Section: Figure (7)contrasting

confidence: 67%

Section: Figure (1): a Schematic Drawing Of A Round-hole Tubementioning

confidence: 99%

Section: Boundary and Loading Conditions: Figure (4)mentioning

confidence: 99%

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Simulation of the cyclic bending response for 6061-T6 aluminum round-hole tubes

2020

JECET

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“…The Bailey-Norton law was modified for simulating the creep curvature-time relationship. Chung et al [17] inspected the response and buckling of sharp-notched 6061-T6 aluminum alloy tubes subjected to cyclic bending. An empirical formulation was proposed to describe the controlled curvature-number of cycles required to initiate buckling relationship.…”

Section: Figure (1)mentioning

confidence: 99%

Cyclic bending ovalization and critical ovalization of round-hole tubes

2020

jecet

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This paper presents an experiment for examining the ovalization of roundhole 7075-O aluminum alloy tubes submitted to cyclic bending. Here round-hole diameters of 2 to 10 mm were considered. It can be seen that the ovalization-curvature relationships demonstrated an asymmetrical, ratcheting, increasing and bow trend with the increase in the number of bending cycles. The hole diameter revealed a dramatic effect to this relationship. Furthermore, higher hole diameters led to larger tube's ovalizations. Although five groups of round-hole 7075-O aluminum alloy tubes tested, the critical ovalization-controlled curvature relationships on a log-log scale exhibited nonparallel straight lines. Finally, a theoretical model was proposed for simulating the aforementioned relationships. The simulation results were compared with experimental test data, which showed generally good agreement.

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“…Both the different notch depths and curvature rates were examined. Lee et al [16] studied the response of sharp-notched circular tubes under pure bending creep and pure bending relaxation Chung et al [17] investigated the collapse of sharp-notched 6061-T6 aluminum alloy tubes subjected to cyclic bending. However, the sharp notch for the aforementioned investigations was a circumferential sharp notch as shown in Fig.1.…”

Section: Introductionmentioning

confidence: 99%

The Failure of Local Sharp-Dented 6061-T6 Aluminum Alloy Tubes With Different Diameter-to-Thickness Ratios Under Cyclic Bending

Lee

Lin

Pan

2018

The International Conference on Applied Mechanics and Mechanica

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In this study, the failure of local sharp-dented 6061-T6 aluminum alloy tubes with different diameter-to-thickness ratios submitted to cyclic bending are investigated. Different diameter-to-thickness ratios of 16.5, 31.0 and 60.0 were considered. The dent depths of tubes were considered from very small to approximately 0.6 times the tube's wall thickness. From the experimental ovalization-curvature relationship, it exhibited an increasing and ratcheting manner when the number of cycles increased. The larger dent depth led to more asymmetrical ovalization-curvature relationship and the greater increase of the ovalization. Furthermore, for a certain diameter-tothickness ratio, five unparallel straight lines corresponding to five different dent 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 for simulating the aforementioned relationship. Through comparison with the experimental data, the theoretical model can properly simulate the experimental findings.

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Collapse of Sharp-Notched 6061-T6 Aluminum Alloy Tubes Under Cyclic Bending

Cited by 10 publications

References 32 publications

Simulation of the cyclic bending response for 6061-T6 aluminum round-hole tubes

Simulation of the cyclic bending response for 6061-T6 aluminum round-hole tubes

Cyclic bending ovalization and critical ovalization of round-hole tubes

The Failure of Local Sharp-Dented 6061-T6 Aluminum Alloy Tubes With Different Diameter-to-Thickness Ratios Under Cyclic Bending

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