{"id":37480,"date":"2019-07-18T11:08:59","date_gmt":"2019-07-18T09:08:59","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=37480"},"modified":"2019-07-18T11:09:20","modified_gmt":"2019-07-18T09:09:20","slug":"contribution-a-letude-de-ladherence-des-structures-du-type-couche-sur-substrat-par-modes-de-rayleigh-generes-et-detectes-par-sources-laser","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/these\/contribution-a-letude-de-ladherence-des-structures-du-type-couche-sur-substrat-par-modes-de-rayleigh-generes-et-detectes-par-sources-laser.html","title":{"rendered":"Contribution \u00e0 l\u2019\u00e9tude de l\u2019adh\u00e9rence des structures du type couche sur substrat par modes de Rayleigh g\u00e9n\u00e9r\u00e9s et d\u00e9tect\u00e9s par sources laser"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_full-25347b0a799d5b9f7058434b2a9c3182\">\n.flex_column.av-av_one_full-25347b0a799d5b9f7058434b2a9c3182{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_one_full-25347b0a799d5b9f7058434b2a9c3182 av_one_full  avia-builder-el-0  avia-builder-el-no-sibling  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-jy8gd041-0dcb5669f049eaf1815428275b172e62'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><blockquote>\n<h4><strong><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/03\/ico_these2.fw_.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-thumbnail wp-image-14684 alignleft\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/03\/ico_these2.fw_-80x80.png\" alt=\"\" width=\"80\" height=\"80\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/03\/ico_these2.fw_-80x80.png 80w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/03\/ico_these2.fw_-36x36.png 36w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/03\/ico_these2.fw_-180x180.png 180w\" sizes=\"auto, (max-width: 80px) 100vw, 80px\" \/><\/a> Martin ROBIN<br \/>\n<\/strong><\/h4>\n<p>Thesis defence<br \/>\n15\/07\/2019<br \/>\nPolytechnic University of Hauts-de-France<\/p>\n<\/blockquote>\n<h4><strong><br \/>\nSummary:<\/strong><\/h4>\n<p>Non-destructive characterisation of the adhesion of film-on-substrate structures is a major industrial and academic challenge. This type of sample is used for many applications and its lifespan depends largely on the quality of adhesion of the films to the substrate. This significantly modifies the dispersive behaviour of surface acoustic waves propagating in this type of structure. To generate and detect these waves, an Ultrasound-Laser device was chosen.<\/p>\n<p>Firstly, we sought to overcome the difficulties of interpretation usually encountered in the control of adhesion by surface acoustic waves. Variations in layer thickness can have an influence on wave dispersion comparable to that caused by adhesion. To achieve this, polymer films of virtually constant thickness are used and applied to an aluminium substrate. These films also have the added property of being transparent. This means that the laser pulse generating the acoustic waves can be focused through the film directly onto the surface of the substrate, placing the acoustic source at the film-substrate interface. The influence of the position of the source on the dispersive behaviour of surface acoustic waves and consequently on the control of adhesion quality is then studied experimentally and through finite element simulations.<\/p>\n<p>Finally, the adhesion of the various samples is characterised using the dispersion curves obtained using the Matrix-Pencil method applied to the experimental results. Using an inversion algorithm, the interface stiffnesses characteristic of the adhesion of the samples analysed are estimated.<\/p>\n<h4><strong>JURY :<\/strong><\/h4>\n<p>&#8211; Bertrand AUDOIN, Professeur \u00e0 l\u2019Universit\u00e9 de Bordeaux, Rapporteur<\/p>\n<p>&#8211; Mounsif ECH CHERIF EL KETTANI, Professeur \u00e0 l\u2019Universit\u00e9 du Havre, Rapporteur<\/p>\n<p>&#8211; Hossep ACHDJIAN, Ma\u00eetre de Conf\u00e9rences \u00e0 l\u2019INSA Centre Val De Loire, Examinateur<\/p>\n<p>&#8211; Doroth\u00e9e CALLENS-DEBAVELAERE, Ma\u00eetre de Conf\u00e9rences \u00e0 l\u2019UPHF, Examinatrice<\/p>\n<p>&#8211; Fr\u00e9d\u00e9ric JENOT, Professeur \u00e0 l\u2019UPHF, Co-Directeur<\/p>\n<p>&#8211; Mohammadi OUAFTOUH, Professeur \u00e0 l\u2019UPHF, Co-Directeur<\/p>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[199],"tags":[],"class_list":["post-37480","post","type-post","status-publish","format-standard","hentry","category-these"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/37480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=37480"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/37480\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=37480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=37480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=37480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}