Finding damage in truss structures exploiting modal strains

Finding damage in truss structures exploiting modal strains

Martina MODESTI, Antonio PALERMO, Cristina GENTILINI

Abstract. The detection of potentially damaged elements in planar truss structures is a challenging task. Among the different methods proposed in literature, one promising procedure exploits the modal strains of the structure that are calculated from the flexibility matrix, which is, in turn, estimated from the lowest frequencies and corresponding modes of vibration. The benefit of this approach stems from the possibility of using a reduced number of mode shapes, usually available from the dynamic monitoring of the structure to perform the damage detection. In this work, a novel damage detection index based on modal strains is proposed, and its reliability in detecting stiffness reduction in elements of a planar truss is tested numerically.

Keywords
Damage Detection, Damage Localization, Truss Structures, Structural Health Monitoring, Flexibility Matrix, Modal Strains

Published online 3/17/2022, 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Martina MODESTI, Antonio PALERMO, Cristina GENTILINI, Finding damage in truss structures exploiting modal strains, Materials Research Proceedings, Vol. 26, pp 145-150, 2023

DOI: https://doi.org/10.21741/9781644902431-24

The article was published as article 24 of the book Theoretical and Applied Mechanics

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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