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Damage identification of low-density material–filled sandwich panels with truss core based on vibration properties

Author(s):





Medium: journal article
Language(s): English
Published in: Structural Health Monitoring, , n. 5-6, v. 18
Page(s): 1711-1721
DOI: 10.1177/1475921718820100
Abstract:

A damage-identification method based on flexibility matrix and Teager energy operator is proposed for low-density material–filled sandwich panels with truss core. In the proposed damage index, weight coefficient r is introduced to consider the effect of damages on both high-order and low-order modes. Numerical simulations and experiments are conducted to assess the performance of the proposed method. Effects of Young’s modulus of the filler material on the accuracy of the proposed method are also discussed. Results reveal that the method is reliable and effective for single-damage and multiple-damages identification of filled sandwich panels with truss core, and weight coefficient plays an important role, especially for cases with multiple damages or damages of small extent. Damage identification becomes more difficult as Young’s modulus of the filler increases, and there is a critical value, after which the damage could not be identified by the proposed method.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1177/1475921718820100.
  • About this
    data sheet
  • Reference-ID
    10562249
  • Published on:
    11/02/2021
  • Last updated on:
    19/02/2021
 
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