Evaluation of resin ultrasonic properties and detecting of porosity using a phased array transducer. Application of composite materials during fabrication
Identifieur interne : 000742 ( France/Analysis ); précédent : 000741; suivant : 000743Evaluation of resin ultrasonic properties and detecting of porosity using a phased array transducer. Application of composite materials during fabrication
Auteurs : Naïm Samet [France]Source :
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Abstract
The experimental studies conducted in the LOMC on the manufacturing of composite materials by use of the RTM (Resin Transfer Molding) process, show the appearance of bubbles at different scales, during the diffusion of the resin into the fiber network. They move during the process, a few are absorbed; others persist and alter the overall quality of the finished product. The subject of this thesis is to study the appearance of bubbles along fibers enclosed in a production channel. The liquid front is followed as it moves by ultrasound techniques. The appearance and the evolution of the bubbles are related, through these measures, to the processes that generate them in order to try and find improvements to the fabrication techniques. The bubbles are detected by signals processing and their evolution is followed in the flow path of the resin. Three main parts are discussed in this thesis: in the first part the behavior of ultrasonic waves interacting with the resin during polymerization is studied. The conditions for bubbles detection within the resin, by use of a phased array transducer, are discussed in the second part. The last part presents the monitoring of the evolution of the bubbles in the composite material during the manufacturing process was also performed. The aim is to quantify the concentration of bubbles relative to the rate amount of fiber and resin. In perspective, imaging techniques using the Doppler effect or nonlinear ultrasonic properties could be considered. The development of control techniques of NDT (Nondestructive Evaluation) during the production of composite materials is to should lead to a better understanding of the phenomena and to complete the feeding of the databases used in numerical simulations
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Hal:tel-00786143Le document en format XML
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Application aux matériaux composites en cours de fabrication</title><author><name sortKey="Samet, Naim" sort="Samet, Naim" uniqKey="Samet N" first="Naïm" last="Samet">Naïm Samet</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-56485" status="VALID"><orgName>Laboratoire Ondes et Milieux Complexes</orgName><orgName type="acronym">LOMC</orgName><desc><address><country key="FR"></country></address><ref type="url">http://www.univ-lehavre.fr/recherche/lomc/</ref></desc><listRelation><relation active="#struct-300317" type="direct"></relation><relation name="FRE1302" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300317" type="direct"><org type="institution" xml:id="struct-300317" status="VALID"><orgName>Université du Havre</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle name="FRE1302" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Le Havre</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université du Havre</orgName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">HAL</idno><idno type="RBID">Hal:tel-00786143</idno><idno type="halId">tel-00786143</idno><idno type="halUri">https://tel.archives-ouvertes.fr/tel-00786143</idno><idno type="url">https://tel.archives-ouvertes.fr/tel-00786143</idno><date when="2010-07-06">2010-07-06</date><idno type="wicri:Area/Hal/Corpus">000116</idno><idno type="wicri:Area/Hal/Curation">000116</idno><idno type="wicri:Area/Hal/Checkpoint">000421</idno><idno type="wicri:Area/Main/Merge">000898</idno><idno type="wicri:Area/Main/Curation">000891</idno><idno type="wicri:Area/Main/Exploration">000891</idno><idno type="wicri:Area/France/Extraction">000742</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Evaluation of resin ultrasonic properties and detecting of porosity using a phased array transducer. Application of composite materials during fabrication</title><title xml:lang="fr">Évaluation ultrasonore des propriétés d'une résine et détection de porosité à l'aide d'un transducteur multiéléments. Application aux matériaux composites en cours de fabrication</title><author><name sortKey="Samet, Naim" sort="Samet, Naim" uniqKey="Samet N" first="Naïm" last="Samet">Naïm Samet</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-56485" status="VALID"><orgName>Laboratoire Ondes et Milieux Complexes</orgName><orgName type="acronym">LOMC</orgName><desc><address><country key="FR"></country></address><ref type="url">http://www.univ-lehavre.fr/recherche/lomc/</ref></desc><listRelation><relation active="#struct-300317" type="direct"></relation><relation name="FRE1302" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300317" type="direct"><org type="institution" xml:id="struct-300317" status="VALID"><orgName>Université du Havre</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle name="FRE1302" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Le Havre</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université du Havre</orgName></affiliation></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>phased array</term><term>polymerization</term><term>ultrasonic</term><term>viscosity</term></keywords><keywords scheme="mix" xml:lang="fr"><term>composites</term><term>multiéléments</term><term>polymérisation</term><term>ultrasons</term><term>viscosité</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The experimental studies conducted in the LOMC on the manufacturing of composite materials by use of the RTM (Resin Transfer Molding) process, show the appearance of bubbles at different scales, during the diffusion of the resin into the fiber network. They move during the process, a few are absorbed; others persist and alter the overall quality of the finished product. The subject of this thesis is to study the appearance of bubbles along fibers enclosed in a production channel. The liquid front is followed as it moves by ultrasound techniques. The appearance and the evolution of the bubbles are related, through these measures, to the processes that generate them in order to try and find improvements to the fabrication techniques. The bubbles are detected by signals processing and their evolution is followed in the flow path of the resin. Three main parts are discussed in this thesis: in the first part the behavior of ultrasonic waves interacting with the resin during polymerization is studied. The conditions for bubbles detection within the resin, by use of a phased array transducer, are discussed in the second part. The last part presents the monitoring of the evolution of the bubbles in the composite material during the manufacturing process was also performed. The aim is to quantify the concentration of bubbles relative to the rate amount of fiber and resin. In perspective, imaging techniques using the Doppler effect or nonlinear ultrasonic properties could be considered. The development of control techniques of NDT (Nondestructive Evaluation) during the production of composite materials is to should lead to a better understanding of the phenomena and to complete the feeding of the databases used in numerical simulations</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Haute-Normandie</li><li>Région Normandie</li></region><settlement><li>Le Havre</li></settlement><orgName><li>Université du Havre</li></orgName></list><tree><country name="France"><region name="Région Normandie"><name sortKey="Samet, Naim" sort="Samet, Naim" uniqKey="Samet N" first="Naïm" last="Samet">Naïm Samet</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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