@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00840424v1> a dcat:Dataset ;
    dct: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.
            """ ;
    dct:identifier "NNT: 2013LEMA1011" ;
    dct:issued "2026-05-10T12:15:13.562080"^^xsd:dateTime ;
    dct:language "fr" ;
    dct:modified "2026-05-10T12:15:13.562084"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Nonlinear characterization of damaged composite plates using guided waves" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
    dcat:distribution <https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00840424v1/resource/9f500a4f-008d-42a4-a021-b01a22eee6b8> ;
    dcat:keyword "a0-lamb-mode",
        "composite-base-polymere",
        "composite-metallique",
        "damage-in-composites",
        "dispersion-de-la-non-linearite",
        "endommagement-des-composites",
        "flexural-waves",
        "guided-waves",
        "infoeu-reposemanticsdoctoralthesis",
        "metal-based-composites",
        "mode-de-lamb-a0",
        "nonlinear-hysteretic-parameters",
        "nonlinear-resonance",
        "nonlinearity-dispersion",
        "ondes-de-flexion",
        "ondes-guidees",
        "parametres-non-lineaires-hysteretiques",
        "phase-velocity",
        "physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother",
        "polymer-based-composites",
        "resonance-non-lineaire",
        "theses",
        "vitesse-de-phase" ;
    dcat:landingPage <https://theses.hal.science/tel-00840424> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00840424v1/resource/9f500a4f-008d-42a4-a021-b01a22eee6b8> a dcat:Distribution ;
    dct:format "HTML" ;
    dct:issued "2026-05-10T12:15:13.585942"^^xsd:dateTime ;
    dct:modified "2026-05-10T12:15:13.532737"^^xsd:dateTime ;
    dct:title "Nonlinear characterization of damaged composite plates using guided waves" ;
    dcat:accessURL <https://theses.hal.science/tel-00840424> .

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    foaf:name "test_moissonnage_selune" .

<https://theses.hal.science/tel-00840424> a foaf:Document .