Propagation of Lamb waves in an immersed periodically grooved plate: experimental detection of the scattered converted backward waves.
Identifieur interne : 000309 ( France/Analysis ); précédent : 000308; suivant : 000310Propagation of Lamb waves in an immersed periodically grooved plate: experimental detection of the scattered converted backward waves.
Auteurs : Nadia Harhad [Algérie] ; Mounsif Ech-Cherif El-Kettani [France] ; Hakim Djelouah [Algérie] ; Jean-Louis Izbicki [France] ; Mihai Valentin Predoi [Roumanie]Source :
- Ultrasonics [ 1874-9968 ] ; 2014.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Aluminum.
- Computer Simulation, Materials Testing, Models, Chemical, Scattering, Radiation, Sound, Surface Properties.
Abstract
Guided waves propagation in immersed plates with irregular surfaces has potential application to detection and assessment of the extent, depth and pattern of the irregularity. The complexity of the problem, due to the large number of involved parameters, has limited the number of existing studies. The simplest case of irregularities of practical interest is the two-dimensional corrosion profile. Even this case is in general so complex, that one can extract several amplitude dominant periodic surfaces only by using a Fourier spectrum of the surface. Guided waves in plates, with one or both free surfaces having periodic perturbations of different shapes, have been presented in specialized literature. In this paper is studied the propagation of Lamb waves in an aluminum plate with a periodic grooved surface on only one side and immersed in water. The interaction between an incident Lamb wave and the grating gives rise to retro-converted waves. Preliminary numerical simulation by the finite element method is performed in order to obtain key parameters for the experiments. It is shown that retro-converted waves radiating into the water are detectable although their amplitudes are small. The phonon relation is verified for the leaky Lamb modes. The damping coefficients of the leaky Lamb modes in the grooved immersed plate are evaluated.
DOI: 10.1016/j.ultras.2013.10.012
PubMed: 24262677
Affiliations:
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pubmed:24262677Le document en format XML
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Electronic address: nharhad@yahoo.fr.</nlm:affiliation><country xml:lang="fr">Algérie</country><wicri:regionArea>Scientific Center of Research on Welding and Control, CSC, BP 64, Cheraga, Algiers</wicri:regionArea><wicri:noRegion>Algiers</wicri:noRegion></affiliation></author><author><name sortKey="El Kettani, Mounsif Ech Cherif" sort="El Kettani, Mounsif Ech Cherif" uniqKey="El Kettani M" first="Mounsif Ech-Cherif" last="El-Kettani">Mounsif Ech-Cherif El-Kettani</name><affiliation wicri:level="1"><nlm:affiliation>Laboratoire Ondes, Milieux Complexes (LOMC), Groupe Ondes Acoustiques (GOA), UMR CNRS 6294, University of Le Havre, Le Havre, France. Electronic address: elkettani@univ-lehavre.fr.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire Ondes, Milieux Complexes (LOMC), Groupe Ondes Acoustiques (GOA), UMR CNRS 6294, University of Le Havre, Le Havre</wicri:regionArea><placeName><settlement type="city">Le Havre</settlement></placeName></affiliation></author><author><name sortKey="Djelouah, Hakim" sort="Djelouah, Hakim" uniqKey="Djelouah H" first="Hakim" last="Djelouah">Hakim Djelouah</name><affiliation wicri:level="1"><nlm:affiliation>U.S.T.H.B, Material Physics Laboratory, BP 32 El Allia, Bab-Ezzouar, Alger, Algeria. 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Electronic address: jean-louis.izbicki@univ-lehavre.fr.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire Ondes, Milieux Complexes (LOMC), Groupe Ondes Acoustiques (GOA), UMR CNRS 6294, University of Le Havre, Le Havre</wicri:regionArea><placeName><settlement type="city">Le Havre</settlement></placeName></affiliation></author><author><name sortKey="Predoi, Mihai Valentin" sort="Predoi, Mihai Valentin" uniqKey="Predoi M" first="Mihai Valentin" last="Predoi">Mihai Valentin Predoi</name><affiliation wicri:level="1"><nlm:affiliation>Department of Mechanics, University Politehnica of Bucharest, Bucharest, Romania. Electronic address: predoi@gmail.com.</nlm:affiliation><country xml:lang="fr">Roumanie</country><wicri:regionArea>Department of Mechanics, University Politehnica of Bucharest, Bucharest</wicri:regionArea><wicri:noRegion>Bucharest</wicri:noRegion></affiliation></author></analytic><series><title level="j">Ultrasonics</title><idno type="eISSN">1874-9968</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminum (chemistry)</term><term>Computer Simulation</term><term>Materials Testing</term><term>Models, Chemical</term><term>Scattering, Radiation</term><term>Sound</term><term>Surface Properties</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Aluminum</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Computer Simulation</term><term>Materials Testing</term><term>Models, Chemical</term><term>Scattering, Radiation</term><term>Sound</term><term>Surface Properties</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Guided waves propagation in immersed plates with irregular surfaces has potential application to detection and assessment of the extent, depth and pattern of the irregularity. The complexity of the problem, due to the large number of involved parameters, has limited the number of existing studies. The simplest case of irregularities of practical interest is the two-dimensional corrosion profile. Even this case is in general so complex, that one can extract several amplitude dominant periodic surfaces only by using a Fourier spectrum of the surface. Guided waves in plates, with one or both free surfaces having periodic perturbations of different shapes, have been presented in specialized literature. In this paper is studied the propagation of Lamb waves in an aluminum plate with a periodic grooved surface on only one side and immersed in water. The interaction between an incident Lamb wave and the grating gives rise to retro-converted waves. Preliminary numerical simulation by the finite element method is performed in order to obtain key parameters for the experiments. It is shown that retro-converted waves radiating into the water are detectable although their amplitudes are small. The phonon relation is verified for the leaky Lamb modes. The damping coefficients of the leaky Lamb modes in the grooved immersed plate are evaluated.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li><li>Roumanie</li></country><settlement><li>Le Havre</li></settlement></list><tree><country name="Algérie"><noRegion><name sortKey="Harhad, Nadia" sort="Harhad, Nadia" uniqKey="Harhad N" first="Nadia" last="Harhad">Nadia Harhad</name></noRegion><name sortKey="Djelouah, Hakim" sort="Djelouah, Hakim" uniqKey="Djelouah H" first="Hakim" last="Djelouah">Hakim Djelouah</name></country><country name="France"><noRegion><name sortKey="El Kettani, Mounsif Ech Cherif" sort="El Kettani, Mounsif Ech Cherif" uniqKey="El Kettani M" first="Mounsif Ech-Cherif" last="El-Kettani">Mounsif Ech-Cherif El-Kettani</name></noRegion><name sortKey="Izbicki, Jean Louis" sort="Izbicki, Jean Louis" uniqKey="Izbicki J" first="Jean-Louis" last="Izbicki">Jean-Louis Izbicki</name></country><country name="Roumanie"><noRegion><name sortKey="Predoi, Mihai Valentin" sort="Predoi, Mihai Valentin" uniqKey="Predoi M" first="Mihai Valentin" last="Predoi">Mihai Valentin Predoi</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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