A numerical-experimental method for damage location based on rotation fields spatial differentiation

  • Authors:
  • H. M. Reis Lopes;J. V. Araújo dos Santos;C. M. Mota Soares;R. J. Miranda Guedes;M. A. Pires Vaz

  • Affiliations:
  • ESTIG, Instituto Politécnico de Bragança, Campus de Sta. Apolónia, Apartado 134, 5301-857 Bragança, Portugal;IDMEC/IST, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;IDMEC/IST, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;DEMEGI, Faculdade de Engenharia do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;DEMEGI, Faculdade de Engenharia do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal

  • Venue:
  • Computers and Structures
  • Year:
  • 2011

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Abstract

This paper presents a structural damage location method that decreases the number of spatial differentiations needed to compute modal curvature fields. The method is numerically and experimentally applied to isotropic and laminated rectangular plates, respectively. A speckle shear interferometer is used to measure the rotation fields of the laminated plate, while the isotropic plate is analysed by finite elements. It was found that the Gaussian differentiation is the most suited technique to compute the curvature fields. It is also demonstrated the superior performance of the curvature method using measured rotation fields instead of measured displacement fields.