Failure of Local Sharp-cut 6061-T6 Aluminum Alloy Tubes Subjected to Cyclic Bending

Research Area: Volume 5,Issue 1, Jan. 2016 Year: 2016
Type of Publication: Article Keywords: 6061 T6 Aluminum Alloy Tubes, Local Sharp Cut, Cyclic Bending, Moment, Curvature, Finite Element ANSYS Analysis, Fatigue Model
  • Kuo-Long Lee
  • Li-Yang Chen
  • Wen-Fung Pan
Journal: IJEIR Volume: 5
Number: 1 Pages: 90-96
Month: January
ISSN: 2277-5668
In this paper, local sharp-cut 6061-T6 aluminum alloy tubes with different cut depths subjected to cyclic bending was experimentally and theoretically investigated. The tube-bending machine and curvature-ovalization measurement apparatus were used to conduct the curvature-controlled cyclic bending test. Five different cut depths of 0.4, 0.8, 1.2, 1.6 and 2.0 mm were considered. The finite element software ANSYS was used to analyze the moment-curvature and ovalization-curvature relationships. Because the failure type was the fatigue fracture, the ANSYS was used to calculate the maximum and minimum stresses for each cyclic bending case. Finally, a simple fatigue model was proposed for predicting the fatigue life of local sharp-cut 6061-T6 aluminum alloy tubes with different cut depths subjected to cyclic bending.

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