Fatigue life prediction of local-dented 6061-T6 aluminumalloy tubes subjected to cyclic bending

Kuo Long Lee, Ching Hsun Meng, Wen Fung Pan

Research output: Contribution to journalArticle

Abstract

In this paper, by using adequate stress-strain relationship, models, mesh elements, boundary conditions and loading conditions, the finite elementANSYS Workbench 15.0was used to analyze the moment-curvature and ovalization-curvature relationshipsfor local-dented 6061-T6 aluminum alloy tubes with dent depths of 0.0, 0.3, 0.6, 0.9 and 1.2 mm subjectedto cyclic bending.Oncethe ANSYSsimulationscan accuratelydescribe theexperimental results, the maximum and minimum stresses for each cyclic bending case can also be accuratelyobtained.Because the failure type was the fatigue fracture, asimple fatigue model was usedto estimate the fatigue life. In addition, due to different amounts between the maximum and minimum stresses, the Walker equation was used for considering the mean stress effect inthe fatigue model. It has been shown that the fatigue model can properly predict the fatigue life of local-dented6061-T6 aluminum alloy tubes with different dentdepths subjected to cyclic bending.

Original languageEnglish
Pages (from-to)37-47
Number of pages11
JournalChung Cheng Ling Hsueh Pao/Journal of Chung Cheng Institute of Technology
Volume46
Issue number1
Publication statusPublished - 2017 Jun

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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