Simulation of Fatigue Life Behavior of Circular Cross-Section Bar with Straight-Fronted Crack

Hamid Alihosseini, Kamran Dehghani, Ghader Faraji

Department of Mechanical Engineering, University College of Engineering, University of Tehran, Tehran, Iran.
Department of Mining and Metallurgy Engineering, Amirkabir University of Technology, Tehran, Iran.

DOI: 10.4236/mnsms.2014.43014                

Abstract

In this paper, fatigue life circular cross-section elastic bar under pure fatigue axial loading is studied through principles of linear elastic fracture mechanics (LEFM) coupled with the three-dimensional finite element technique for determination of critical crack size and residual lifetime. Three different initial notch depths are discussed. The relations between aspect ratio (b/c) and relative crack depth (b/D) are obtained, and it is shown that there is great difference in the growth of cracks with different front shapes and initial notch depths.

Keywords

Simulation, Fatigue Life, Crack Shape

Conflicts of Interest

The authors declare no conflicts of interest.

References

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