Structural Damage Detection by Using Finite Element Method as Function of Length

Authors

  • Djamel Bensahal University of Biskra
  • Mohamed Nadir Amrane University of Biskra
  • Foued Chabane University of Biskra
  • Okba Belahssen University of Biskra
  • Said Benramache University of Biskra

DOI:

https://doi.org/10.4186/ej.2013.17.4.111

Keywords:

Damping, modal analysis, composites, finite element method, frequency.

Abstract

The work described in this paper involves the effect of length and fibre orientation of the composite damping for comparison with the analytical results. The calculation of laminate damping is performed by use of a strain energy method. The modal analysis of the structure for different loading rates is based on the analytical method used to solve the equation of free vibrations. The difference between strain energies for both cases (damaged and undamaged) are calculated by the finite element method. The structural damping of the different beams is evaluated from these energies. The decrease in frequency for different rates of loading shows the loss of stiffness for all lengths studied.

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Author Biographies

Djamel Bensahal

Mechanics Department, Faculty of Sciences and Technology, University of Biskra, Algeria

Mohamed Nadir Amrane

Mechanics Department, Faculty of Sciences and Technology, University of Biskra, Algeria

Foued Chabane

Mechanics Department, Faculty of Sciences and Technology, University of Biskra, Algeria

Okba Belahssen

Material Sciences Laboratory, Faculty of Science, University of Biskra, Algeria

Said Benramache

Material Sciences Laboratory, Faculty of Science, University of Biskra, Algeria

Published

Vol 17 No 4, Apr 10, 2013

How to Cite

[1]
D. Bensahal, M. N. Amrane, F. Chabane, O. Belahssen, and S. Benramache, “Structural Damage Detection by Using Finite Element Method as Function of Length”, Eng. J., vol. 17, no. 4, pp. 111-124, Apr. 2013.