A Vibration-Based Method for assessing the integrity of welded structures

Rafael de La Cruz, V. and Salehi Paniagua, K. and Salgado Sánchez, P. and García-Fogeda, Pablo (2019). A Vibration-Based Method for assessing the integrity of welded structures. "Nondestructive Testing and Evaluation", v. 35 (n. 4); pp. 452-472. ISSN 1058-9759. https://doi.org/10.1080/10589759.2019.1692011.

Description

Title: A Vibration-Based Method for assessing the integrity of welded structures
Author/s:
  • Rafael de La Cruz, V.
  • Salehi Paniagua, K.
  • Salgado Sánchez, P.
  • García-Fogeda, Pablo
Item Type: Article
Título de Revista/Publicación: Nondestructive Testing and Evaluation
Date: November 2019
ISSN: 1058-9759
Volume: 35
Subjects:
Freetext Keywords: Vibrations; modal analysis; welding and damage detection
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A Vibration-Based Method for assessing the integrity of welded structures is presented. The proposed technique relies on fitting theoretical predictions of a lumped mass-based model of the welding with experimental measurements obtained from modal analysis. Experiments are performed in various test platens that are soldered at one or two locations and exhibit distinct welding qualities, achieved by using different control parameters in the welding process. The inertia added during the soldering execution is modelled by a lumped mass that connects to the structural element via linear springs. The associated rigidities play the role of fitting parameters and are adjusted to reproduce the (three) measured natural frequencies by means of optimisation algorithms. This method is successful in characterising the platens tested and provides an accurate and consistent (with the expected welding quality) quantification of their effective mechanical properties at the bond. We note that this is beyond the qualitative evaluation achieved with other extended Non-Destructive Testing techniques. Such characterisation is possible even without particular knowledge of modal shapes, whose experimental determination is difficult in any real structure, although different resonant frequencies must be considered to achieve reliable estimates. Based on the present results, we suggest that this technique can be used for assessing the overall integrity of welded structures in a quantitative and a reliable manner.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainESP2015-70458-PUnspecifiedUnspecifiedControl de fluidos vibrados en microgravedad
Government of SpainESP2016-75075-RUnspecifiedUnspecifiedGeneración eficiente y postproceso de bases de datos aeronáuticas

More information

Item ID: 67132
DC Identifier: http://oa.upm.es/67132/
OAI Identifier: oai:oa.upm.es:67132
DOI: 10.1080/10589759.2019.1692011
Official URL: https://www.tandfonline.com/doi/abs/10.1080/10589759.2019.1692011?journalCode=gnte20#:~:text=ABSTRACT-,A%20Vibration-Based%20Method%20for%20assessing%20the,of%20welded
Deposited by: Memoria Investigacion
Deposited on: 31 May 2021 10:23
Last Modified: 31 May 2021 10:23
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