PSI - Issue 18

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 18 (2019) 280–286

25th International Conference on Fracture and Structural Integrity Thermographic analysis during tensile tests and fatigue assessment of S355 steel P. Corigliano*, F. Cucinotta, E. Guglielmino, G. Risitano, D. Santonocito University of Messina, Contrada Di Dio (S. Agata), 98166 Messina, Italy Abstract Structural S355 steel is widely applied in various sectors. Fatigue properties are of fundamental importance and extremely time consuming to be assessed. The aim of this research activity is to apply the Static Thermographic Method during tensile tests and correlate the temperature trend to the fatigue properties of the same steel. The Digital Image Correlation (DIC) and Infrared Thermography (IR) techniques have been used during all static tests. The Digital Image Correlation technique allowed the detection of displacements and strain, and so the evaluation of the mechanical properties of the material. Traditional fatigue tests were also performed in order to evaluate the stress-number of cycles to failure curve of the same steel. The value of the fatigue limit, obtained by the traditional procedure, was compared with the values predicted by means of the Static Thermographic Method (STM) obtained from tensile tests. The predicted values are in good agreement with the experimental values of fatigue life. 25th International Conference on Fracture and Structural Integrity Thermographic analysis during tensile tests and fatigue assessment of S355 steel P. Corigliano*, F. Cucinotta, E. Guglielmino, G. Risitano, D. Santonocito University of Messina, Contrada Di Dio (S. Agata), 98166 Messina, Italy Abstract Structural S355 steel is widely pplied in various sectors. Fatigue properties are of fundamental importance and xtrem ly time nsuming to be assessed. The aim of this research activity is to apply the Static Thermographic Method during tensile tests an correlate the temperature trend to th fatigue properties of the same steel. The Digital Image Correlation (DIC) and Infrared Thermography (IR) techniques have b en used during all static tests. The Digital Image Correlation technique allowed the d t ction of displacements and strain, and so the evaluation of th mechanical properties of the material. Traditional fati e tests were also performed in rder to eval ate the stress-number of cycles to failure curve of the same steel. The value of the fatigue limit, obtained by the traditional procedure, was compared with the values pr dicted by means of the Static Thermographic Method (STM) obtained from tensile tests. The predicted values are in good agreement with the experimental values of fatigue life.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Keywords: Infrared Thermography; Digital Image Correlation, Fatigue, Marine structures, Tensile tests. Keywords: Infrared Thermography; Digital Image Correlation, Fatigue, Marine structures, Tensile tests.

1. Introduction Full-field measurement techniques have been applied in literature for the experimental investigation of metallic and composite materials subjected to mechanical and thermal loading [1–6]. 1. Introduction Full-field measurement techniques have been applied in literature for the experimental investigation of metallic and composite materials subjected to mechanical and thermal loading [1–6].

* Corresponding author. Tel.: +390906765940 E-mail address: pcorigliano@unime.it * Corresponding author. Tel.: +390906765940 E-mail address: pcorigliano@unime.it

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2019.08.165