Numerical evaluation of thermal load applied by magnetic induction and solar loading aimed at experimental analyses using thermo-graphic techniques

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Published: Jun 19, 2024
DOI: https://doi.org/10.12681/monubasin.8317
Keywords:
Solar loading Infrared thermography Numerical modelling with magnetic field coupling with heat transfer Laser scanner geometric reconstruction Bronze
Stefano Perilli
Yinuo Ding
Hai Zhang
Stefano Sfarra
Abstract

The study describes a first approach of integration among infrared thermography inspections under solar loading conditions, and a heating provided by magnetic induction in view of a future induction thermography test. An ancient bronze helmet, part of a statue located in L'Aquila (Italy) and inaugurated on October 14th, 1928, is the sample under test (SUT) herein. The corrosion process over time (17 years: 2007 – 2024) is evaluated via numerical and experimental techniques. It requires the presence of a temperature gradient priming the heat transfer mechanism through the SUT. Experimental configurations of infrared thermography (IRT) allowed the detection of defects like e.g. cracks and pitting. For this reason, the study was integrated with a preliminary magnetic induction test, i.e. a numerical model, in view of a future in situ thermographic test. To determine the appropriate distance and working time of the induction heater, a modelling was carried out in COMSOL Multiphysics®. The ancient bronze helmet was acquired by a non-contact instrument produced by CREAFORM model Go! SCAN 3D®. The mesh was exported in COMSOL Multiphysics® for further conditioning and processing. In particular, the authors used the magnetic field coupling with a heat transfer package to obtain a reasonable thermal distribution on the modeled artefact. Concerning the thermographic analyses, a FLIR S65 HS and a FLIR T1020 thermal camera were used in the 2007 and 2024 inspections, respectively. A preliminary post-processing of the latest thermographic data is performed herein.

Article Details
  • Section
  • Part IV - Methodologies for Characterization and Damage Assessment

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Author Biographies
Stefano Perilli

Department of Information Engineering, Electronics and Telecommunications, “Sapienza” University of Rome

Yinuo Ding

Centre for Composite Materials and Structures (CCMS), Harbin Institute of Technology, 150001, Harbin, China

Hai Zhang

Centre for Composite Materials and Structures (CCMS), Harbin Institute of Technology, 150001, Harbin, China

Stefano Sfarra

Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100, L’Aquila, Italy

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