Numerical simulation and improved correlation techniques for low energy impact detection and damage characterization with elastic waves on composite structures

Sáchez Iglesias, F. and García Alonso, J. and Tejerina Hernanz, R. and Oslé, E. and Iglesias Vallejo, M. and Lorente, L. S. and García Etxebarria, J. and Alonso Fernández, Diego and Lozano, A. and Fernández Díaz, P. and Larrañaga, B. and Pozo, A.R. and Fernández López, A. (2017). Numerical simulation and improved correlation techniques for low energy impact detection and damage characterization with elastic waves on composite structures. In: "NAFEMS World Congress 2017", 11-14 jun 2017, Stockholm.

Description

Title: Numerical simulation and improved correlation techniques for low energy impact detection and damage characterization with elastic waves on composite structures
Author/s:
  • Sáchez Iglesias, F.
  • García Alonso, J.
  • Tejerina Hernanz, R.
  • Oslé, E.
  • Iglesias Vallejo, M.
  • Lorente, L. S.
  • García Etxebarria, J.
  • Alonso Fernández, Diego
  • Lozano, A.
  • Fernández Díaz, P.
  • Larrañaga, B.
  • Pozo, A.R.
  • Fernández López, A.
Item Type: Presentation at Congress or Conference (Article)
Event Title: NAFEMS World Congress 2017
Event Dates: 11-14 jun 2017
Event Location: Stockholm
Title of Book: NAFEMS World Congress 2017
Date: 2017
Subjects:
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Materiales y Producción Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Thin-walled composite aircraft structures commonly used on fuselage and wing skins are prone to in-service impacts that could compromise the structural integrity and could be hard and expensive to detect by traditional methods. The development of a Structural Health Monitoring (SHM) System able to detect and characterize this kind of impacts can reduce the cost for maintenance and inspection and furthermore the results obtained from this system could be used to improve the analysis and design of the structure. However, one of the main challenges of a SHM system is the detection and location of impacts as well as the characterization of the resulting damages. A SHM system based on the detection of the elastic waves generated by an impact has been developed by Airbus Defence and Space In order to increase the knowledge of the structural response under impact, a set of Numerical Simulations using Explicit Finite Element analysis codes have been performed: These simulations cover different typical aircraft structures and they have been validated against physical tests; however the correlation between simulations and tests present some complexity due to its sensibility to a great number of undetermined factors, the difficulties of wave characterization and the determination of wave times of arrival to a specific location. Due to that complexity, a surrogate modelling optimization process, developed with our partner Mathlas, has been introduced in order to improve the correlation between test and analysis. The target of this study is to develop a robust simulation methodology which could support the development of a reliable Structural Health Monitoring System for real aircraft structures reducing the number of physical tests and improving the methodologies for FEM-Test correlation. The paper presents details of the different FE Models and test specimens, results from simulation and tests and highlights the advantages and challenges of this simulation and correlation methodology.

More information

Item ID: 53955
DC Identifier: http://oa.upm.es/53955/
OAI Identifier: oai:oa.upm.es:53955
Official URL: https://www.nafems.org/congress
Deposited by: Memoria Investigacion
Deposited on: 05 Jun 2019 09:52
Last Modified: 05 Jun 2019 09:52
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