Nonlinear characterization of damaged composite plates using guided waves
type: Dataset
description: Sensitivity of non-linear acoustics techniques to the presence and evolution of micro-damage has been proven on a large scale of materials. In particular, different works showed the use of the nonlinear resonance as a reliable method to characterise damage in heterogeneous materials through the drop of the resonance frequency ƒ and the quality factor Q as a function of the dynamic strain. Therefore, nonlinear hysteretic parameters (NLH) ƒ and Q have only been determined in a narrow frequency band. The present work develops an original approach, which allows to follow the frequency dispersion of ƒ and Q by using guided waves propagating in polymer and metal based composite plates. Furthermore, the guided wave approach made possible the definition of a new NLH parameter V through the A0 Lamb mode. One of the original results is that the ratio V/ƒ remains constant for both materials (~2) despite the considered frequency. This encouraging result allows for the first time to show that it is possible to generalise the NLH behaviour in the case of a plate-like structures using the Lamb formalism. Finally, this present PhD thesis defines a new large frequency band NLH parameter ∆S in order to follow the sensitivity of the vibration spectrum to the present damage. The performed experiments have shown that ∆S can be nonlinear either at the very first excitation levels or at a given threshold. This encouraging experimental result shows that there is a real interest in broadening the frequency domain in order to better understand the changes that occur in heterogeneous materials when the dynamic strain is increased.
landing page: https://theses.hal.science/tel-00840424
identifier: NNT: 2013LEMA1011
keyword: a0-lamb-mode
keyword: composite-base-polymere
keyword: composite-metallique
keyword: damage-in-composites
keyword: dispersion-de-la-non-linearite
keyword: endommagement-des-composites
keyword: flexural-waves
keyword: guided-waves
keyword: infoeu-reposemanticsdoctoralthesis
keyword: metal-based-composites
keyword: mode-de-lamb-a0
keyword: nonlinear-hysteretic-parameters
keyword: nonlinear-resonance
keyword: nonlinearity-dispersion
keyword: ondes-de-flexion
keyword: ondes-guidees
keyword: parametres-non-lineaires-hysteretiques
keyword: phase-velocity
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: polymer-based-composites
keyword: resonance-non-lineaire
keyword: theses
keyword: vitesse-de-phase
issued: 2026-05-10T12:15:13.562080
modified: 2026-05-10T12:15:13.562084
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Nonlinear characterization of damaged composite plates using guided waves
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00840424
issued: 2026-05-10T12:15:13.585942
modified: 2026-05-10T12:15:13.532737