Comparison of Experimental Thermal Methods for the Fatigue Limit Evaluation of a Stainless Steel

Metals

Antonino Risitano¹  Giacomo Risitano²  Bruno Atzori³  Giovanni Meneghetti³  Mauro Ricotta³ 

[1] Department of Civil Engineering and Architecture, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy;Department of Engineering, University of Messina, Contrada di Dio, 98166 Messina, Italy;Department of Industrial Engineering, University of Padova, via Venezia, 1, 35131 Padova, Italy;

关键词: rapid evaluation of fatigue limit;    thermal methods;    energy approaches;   

DOI  :  10.3390/met9060677

来源: DOAJ

【 摘 要 】

This paper regards the rapid determination of fatigue limit by using thermal data analysis. Different approaches available in the literature to estimate the fatigue limit of cold-drawn AISI 304L bars are analyzed and compared, namely, temperature- and energy-based methods. Among the temperature-based approaches, the Risitano Method (RM) and the method based on material temperature evolution recorded during a static tensile test were analyzed. Regarding the energy-based approaches, the input mechanical energy density stored in the material per cycle (i.e., the area of the hysteresis loop), the heat energy dissipated by the material to the surroundings per cycle, and the “2nd-harmonic-based” methods were considered. It was found that for the material analyzed, all the considered energy-based approaches provided a very good engineering estimation of the material fatigue limit compared to a staircase test.

【 授权许可】

Unknown