Intuitionistic fuzzy divergence for evaluating the mechanical stress state of steel plates subject to bi-axial loads

• Published in: Integrated computer-aided engineering Vol. 31; no. 4; pp. 363 - 379
• Main Authors: Versaci, Mario, Angiulli, Giovanni, La Foresta, Fabio, Laganà, Filippo, Palumbo, Annunziata
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 31.07.2024; Sage Publications Ltd
• Subjects: Axial loads; Classification; Eddy currents; Fuzzy logic; Software; Steel plates; Uncertainty; FEM-Galerkin approach; eddy currents; Steel plates; intuitionistic fuzzy image classification; intuitionistic fuzzy total divergence
• ISSN: 1069-2509; 1875-8835
• DOI: 10.3233/ICA-230730

The uncertainty that characterizes the external mechanical loads to which any connection plate in steel structures is subjected determines the non-uniqueness of the isochoric deformation distributions. Since the eddy currents induced on the plates produce magnetic field maps with a high fuzziness content, similar to those of the isochoric deformations, their use can be exploited to evaluate the extent of the external load that determines a specific induced current map. Starting from an approach known in the literature, according to which the map-external load association is operated through fuzzy similarity computations, in this paper, we generalize this method by reformulating it in terms of intuitionistic fuzzy logic by proposing a classification based on divergence computations. Our approach, acting adaptively on the fuzzification of the maps, results in a better classification percentage, besides significantly reducing the presence of doubtful cases due to the uncertainty of each applied load. Furthermore, a FEM software tool was developed, which turned out to be, to a certain extent, a substitute for the experimental procedure, notoriously more expensive. Even if the procedure was applied on plates subjected to bi-axial loads, it could be used for other types of loads since the classification operator processes the eddy current maps exclusively, regardless of their cause.