{"id":61391,"date":"2023-12-08T15:20:40","date_gmt":"2023-12-08T13:20:40","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=61391"},"modified":"2023-12-08T15:20:40","modified_gmt":"2023-12-08T13:20:40","slug":"these-andrea-cannizzo-statistical-mechanics-and-thermodynamics-of-adhesion-phase-transformations-and-fracture-in-micro-and-nano-systems","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/agenda\/these-andrea-cannizzo-statistical-mechanics-and-thermodynamics-of-adhesion-phase-transformations-and-fracture-in-micro-and-nano-systems.html","title":{"rendered":"THESE : Andrea CANNIZZO \u2013 \u00ab\u00a0Statistical Mechanics and Thermodynamics of Adhesion, Phase Transformations, and Fracture in Micro- and Nano-Systems\u00a0\u00bb"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_ut0al4p5cg4r\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-61391'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lpwng2s9-885a1ee895163e8685636278726ea50e\">\n#top .av-special-heading.av-lpwng2s9-885a1ee895163e8685636278726ea50e{\nmargin:0 0 10px 0;\npadding-bottom:4px;\n}\nbody .av-special-heading.av-lpwng2s9-885a1ee895163e8685636278726ea50e .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-lpwng2s9-885a1ee895163e8685636278726ea50e .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-lpwng2s9-885a1ee895163e8685636278726ea50e av-special-heading-h2  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESE : Andrea CANNIZZO \u2013 \u00ab\u00a0Statistical Mechanics and Thermodynamics of Adhesion, Phase Transformations, and Fracture in Micro- and Nano-Systems\u00a0\u00bb<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-2f4600354c0449b610997916bbd9b6bc'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-68e036126b913e5028f77311dc66b825\">\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825{\ncolor:#bfbfbf;\nborder-color:#bfbfbf;\n}\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825 .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-68e036126b913e5028f77311dc66b825 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<p><strong>Andr\u00e9a CANNIZZO<\/strong><\/p>\n<p><strong>Le 19 D\u00e9cembre\u00a0 \u00e0 14h00<br \/>\n<\/strong>Amphith\u00e9\u00e2tre Cuccaroni\u00a0\u00bb, Centrale Lille, Cit\u00e9 Scientifique<\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-628129dba2299b2ecd65ebfc92eac29d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5><strong><span style=\"color: #800000;\">Jury :<\/span><\/strong><\/h5>\n<p>Reviewer: M. Lo\u00efc, Vanel, Prof. ILM CNRS, Univ. Lyon 1,<br \/>\nReviewer: Mme Anne, Tanguy, Prof. INSA Univ. Lyon,<br \/>\nExaminer: M. St\u00e9phane, Santucci, DR CNRS, ENS de Lyon<br \/>\nExaminer: M. Matteo, Ciccotti, Prof. ESPCI Paris<br \/>\nExaminer: Mme Delphine, Brancherie, Prof. UTC Compi\u00e8gne<br \/>\nCo-supervisor: M. Stefano, Giordano, DR CNRS, IEMN CNRS, Univ. Lille<br \/>\nCo-supervisor: M. Giuseppe, Puglisi, Prof. DICATECh Bari, Italie<br \/>\nGuest: M. Giuseppe, Florio, Prof. DICATECh Bari, Italie<\/p>\n<h5>Summary:<\/h5>\n<p>Les ph\u00e9nom\u00e8nes de micro-instabilit\u00e9 et de multi-stabilit\u00e9 jouent un r\u00f4le cl\u00e9 dans divers syst\u00e8mes m\u00e9caniques et physiques, tant artificiels que biologiques. Leur compr\u00e9hension fait donc l\u2019objet d\u2019un vaste champ d\u2019\u00e9tudes, avec de nombreuses applications pratiques et th\u00e9oriques. La mod\u00e9lisation de l\u2019effet de la temp\u00e9rature sur les micro-instabilit\u00e9s, apparaissant dans diff\u00e9rents ph\u00e9nom\u00e8nes artificiels et biologiques, permet la validation de la m\u00e9canique statistique pour les petits syst\u00e8mes, par la comparaison avec les donn\u00e9es exp\u00e9rimentales obtenues \u00e0 l\u2019aide de la spectroscopie de force et d\u2019essais microm\u00e9caniques, fournissant ainsi des informations utiles sur les r\u00e9ponses induites par les forces ou les allongements appliqu\u00e9s. Ces analyses sont particuli\u00e8rement importantes pour l\u2019\u00e9tude de tous les syst\u00e8mes qui pr\u00e9sentent deux (ou plus) \u00e9tats m\u00e9tastables, tels que les processus d\u2019adh\u00e9sion\/d\u00e9adh\u00e9sion, les transformations de phase (pliage\/d\u00e9pliage et ph\u00e9nom\u00e8nes pseudo-\u00e9lastiques) et la propagation des fissures et des fractures dans les syst\u00e8mes \u00e0 l\u2019\u00e9chelle nano- et micro-m\u00e9triqe. \u00c0 titre d\u2019exemple, la temp\u00e9rature influence fortement les caract\u00e9ristiques de transformation de phase des nanofils pseudo-\u00e9lastiques utilis\u00e9s comme actionneurs et capteurs en nanotechnologie, ou modifie les propri\u00e9t\u00e9s d\u2019adh\u00e9sion des cellules m\u00e9tastatiques dans les processus d\u2019invasion du cancer. La r\u00e9ponse force-extension ou contrainte-d\u00e9formation est l\u2019une des principales caract\u00e9ristiques utiles pour comprendre les effets des micro-instabilit\u00e9s et, pour l\u2019obtenir analytiquement, il faut \u00e9valuer la fonction de partition du syst\u00e8me, qui est l\u2019outil essentiel de la m\u00e9canique statistique. Par cons\u00e9quent, la forme complexe de l\u2019\u00e9nergie potentielle du probl\u00e8me \u00e9tudi\u00e9 est approxim\u00e9e en utilisant la technique des variables de spin, ce qui permet d\u2019obtenir une quantit\u00e9 discr\u00e8te capable d\u2019identifier les diff\u00e9rents puits d\u2019\u00e9nergie potentielle. La premi\u00e8re partie de cette th\u00e8se traite de l\u2019\u00e9tat de l\u2019art, des probl\u00e8mes ouverts, des motivations et de la description des m\u00e9thodologies adopt\u00e9es. La partie suivante montre comment diff\u00e9rents ph\u00e9nom\u00e8nes physiques peuvent \u00eatre \u00e9tudi\u00e9s par la m\u00eame approche de mod\u00e9lisation.<\/p>\n<h5>Abstract:<\/h5>\n<p>Micro-instability and multi-stability phenomena play a key role in various mechanical and physical systems, both artificial and biological. As such, their understanding is addressed in a wide field of studies, with many practical and theoretical applications. The modeling of the temperature effect on micro-instabilities, appearing in different artificial and biological phenomena, allows the validation of the statistical mechanics for small systems, through the comparison with experimental data obtained using force spectroscopy and micromechanical testing, thus providing useful insights on the responses induced by applied forces or elongations. These analyses are particularly important in the study of all the systems that present two (or more) metastable states such as the adhesion\/deadhesion processes, the phase transformations (e.g. the folding\/unfolding and pseudo-elastic phenomena) and the cracks and fractures propagation in nano- and micro-scale systems. For examples, the temperature strongly influences the phase transoformation features of pseudo-elastic nanowires used as actuators and sensors in nanotechnology, or modifies the adhesion properties of metastatic cells in cancer invasion processes. The force-extension or stress-strain response is one of the main useful features to understand the effects of micro-instabilities and, in order to be analytically obtained, one needs to evaluate the system partition function, which is the essential tool of the statistical mechanics. Hence, the complex potential energy landscape of the problem under investigation is approximated using the spin variables technique, intoducing a discrete quantity able to identify the different potential energy wells. The first part of this thesis addresses the state of the art, the open problems, the motivations and the description of the adopted methodologies. The following part shows how commonly different physical phenomena can be studied by the same modelling approach<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":61393,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[65,87,84,187],"tags":[],"class_list":["post-61391","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-agenda","category-agenda-en","category-agenda-en-en","category-annonces-these"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/61391","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\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=61391"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/61391\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/61393"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=61391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=61391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=61391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}