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Nonlinear acoustic fast and slow dynamics of damaged composite materials: correlation with acoustic emission

  • M. BentaharEmail author
  • A. Marec
  • R. El Guerjouma
  • J. H. Thomas
Part of the Springer Proceedings in Physics book series (SPPHY, volume 128)

Abstract

Slow and fast dynamics in the elastic response of damaged materials to external excitations show evidence of an anomalous hysteretic elastic behavior. Experimental observations may be used to detect and eventually characterize damage existing in structural components. Here we analyze the evolution of nonlinear dynamic behavior of a polymer-based composite (SMC) and concrete. More particularly, nonlinear slow dynamics parameters have been found to be very sensitive to damage evolution for both materials. Besides, acoustic emission monitoring is used to calculate the elastic energy released by SMC during a gradual increasing damage procedure. Interesting logarithm-like evolution of the followed nonlinear parameters as a function of the calculated energy is found. A classification of the calculated acoustic emission signal is proposed to understand the contribution of the different damage mechanisms to the evolution of the nonlinear behavior of SMC.

Keywords

Acoustic Emission Resonance Mode Damage State Slow Dynamic Concrete Sample 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • M. Bentahar
    • 1
    Email author
  • A. Marec
    • 1
  • R. El Guerjouma
    • 1
  • J. H. Thomas
    • 1
  1. 1.LAUM, CNRSUniversité du Maine, Av. O. MessiaenLe MansFrance

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