Issue 39

A. Risitano et alii, Frattura ed Integrità Strutturale, 39 (2017) 202-215; DOI: 10.3221/IGF-ESIS.39.20 202 Fatigue assessment by energy approach during tensile tests on AISI 304 steel A. Risitano C.R.P.S. srl arisitan@gmail.com D. Corallo University of Catania, Department of Industrial Engineering dcorallo@dii.unict.it E. Guglielmino, G. Risitano University of Messina, Department of Engineering giacomo.risitano@unime.it , http://orcid.org/0000-0002-0506-8720 eguglie@unime.it, http://orcid.org/0000-0001-7793-7406 L. Scappaticci Guglielmo Marconi University l.scappaticci@unimarconi.it A BSTRACT . Estimation of the fatigue limit for steel ductile materials using non-destructive methods is a topic of great interest to researchers today. In recent years, the method adopted has implemented infrared sensors to detect the surface temperature and correlate it with the fatigue limit. In previous paper, a new energy approach was proposed to investigate the fatigue limit during tensile test. The numerical procedure proposed by Chrysochoos is adopted to clean infrared images and applied to analyse the surface heat sources during tensile test. AISI 304 specimens with rectangular cross-sections are tested. Moreover fatigue tests at increasing loads were carried out on steel by a stepwise succession, applied to the same specimen, for applying the thermographic method. The predictions of the fatigue limit, obtained by the analysis of the energy evolution during the static tests, were compared with the predictions obtained applying the thermographic method during fatigue tests. K EYWORDS . Fatigue Limit; Mono Axial Static Test; Thermographic Method. Citation: Risitano, A., Corallo, D., Guglielmino, E., Risitano, G., Scappaticci, L., Fatigue assessment by energy approach during tensile tests on AISI 304 steel, Frattura ed Integrità Strutturale, 39 (2017) 202-215. Received: 10.06.2016 Accepted: 10.10.2016 Published: 01.01.2017 Copyright: © 2017 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.