J Shanghai Jiaotong Univ Sci ›› 2021, Vol. 26 ›› Issue (6): 765-773.doi: 10.1007/s12204-020-2237-5

• Material, Structure, Mechanics • Previous Articles     Next Articles

Experimental Study on Medium and Low Cycle Fatigue Properties of Cast Steel GS20Mn5V

JIN Hui∗ (靳慧), MO Jianhua (莫建华), SUN Sijia (孙思嘉), ZHAO Jing (赵静)   

  1. (Jiangsu Key Laboratory of Engineering Mechanics & Key Laboratory of Concrete and Prestressed Concrete Structures ofMinistry of Education, School of Civil Engineering, Southeast University, Nanjing 210096, China)
  • Received:2019-05-20 Online:2021-11-28 Published:2021-12-01

Abstract: Owing to the remarkable advantages in mechanical behavior, cast steel nodes have been widely usedin static structures. Nowadays, cast steel nodes also gain increasing popularity due to the superior fatigue performancein dynamic structures, but they are not yet widely used because the fatigue properties of cast steel arenot well understood. In this paper, the fatigue test of cast steel GS20Mn5V commonly used in steel castings iscarried out. The strength of medium and low cycle fatigue and the fatigue limit are obtained. The feasibilityof the estimated S-N (fatigue stress versus life) curve is tested. The double logarithmic linear model (DLLM)and the reversed generalized Pareto model (RGPM) are used to fit the experimental data, and the comparisonis made. The P-S-N (the relationship between fatigue stress and life at different survival rates) curve obtainedby the RGPM is proposed. The results show that the estimated S-N curve is not suitable for low cycle fatiguelife, fitting the experimental data with the RGPM is the best, and obtaining the P-S-N curve from the RGPM isfeasible.

Key words: cast steel GS20Mn5V, fatigue test, double logarithmic linear model (DLLM), reversed generalizePareto model (RGPM), S-N curve, P-S-N curve

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