Volume 33 Issue 12
Dec.  2018
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Effect of mean stress on multiaxial fatigue failure of 30CrMnSiA steel[J]. Journal of Aerospace Power, 2018, 33(12). doi: 10.13224/j.cnki.jasp.2018.12.018
Citation: Effect of mean stress on multiaxial fatigue failure of 30CrMnSiA steel[J]. Journal of Aerospace Power, 2018, 33(12). doi: 10.13224/j.cnki.jasp.2018.12.018

Effect of mean stress on multiaxial fatigue failure of 30CrMnSiA steel

doi: 10.13224/j.cnki.jasp.2018.12.018
  • Received Date: 2017-12-19
  • Publish Date: 2018-12-28
  • Fatigue experiments were carried out to investigate the effects of mean-stress and phase-difference on the tension-torsion fatigue life of 30CrMnSiA high strength steel, while the experimental data and plane stress characteristics of different mean stress and phase difference were analyzed. The test results showed that the fatigue life increased with the growing phase difference without mean stress, but decreased with the increase of phase difference when mean stress existed, whether mean normal stress or mean shear stress. Criteria based on the linear combination of the shear stress amplitude and normal stress on the maximum shear stress amplitude plane cannot reflect the test results correctly to some degree. Moreover, the initial crack angle was measured showing that its direction was close to the maximum shear stress amplitude plane. Finally, the defects of the criteria based on the linear combination shear stress amplitude and maximum normal stress on the maximum shear stress amplitude stress plane were explained by stress analysis.

     

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