Energy-Based Prediction of Low-Cycle Fatigue Life of CK45 Steel and SS316 Stainless Steel

Subject Areas : Engineering

M Shariati ¹ , H Mehrabi ²

1 - Department of Mechanical Engineering, Ferdowsi University of Mashhad
2 - Department of Mechanical Engineering, Shahrood University of Technology

Received: 2014-04-09 Accepted : 2014-06-12 Published : 2014-09-30

Keywords: CK45 Steel, low cycle fatigue, Damage parameter, SS316 stainless steel, Cyclic behavior,

Abstract :

In this paper, low cycle fatigue life of CK45 steel and SS316 stainless steel under strain-controlled loading are experimentally investigated. In addition, the impact of mean strain and strain amplitude on the fatigue life and cyclic behavior of the materials are studied. Furthermore, it is attempted to predict fatigue life using energy and SWT damage parameters. The experimental results demonstrate that increase in strain amplitude decreases fatigue life for both materials, strain amplitude has a remarkable effect on fatigue life, and the impact of mean strain is approximately negligible. Furthermore, the energy damage parameter provides more accurate prediction of fatigue life for both materials.

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