{"id":114489,"date":"2025-06-19T15:04:51","date_gmt":"2025-06-19T13:04:51","guid":{"rendered":"https:\/\/xometry.pro\/stories\/ucl-racing-flexible-airless-tyre\/"},"modified":"2025-06-24T17:00:42","modified_gmt":"2025-06-24T15:00:42","slug":"uclr-pneu-souple-sans-air","status":"publish","type":"stories","link":"https:\/\/xometry.pro\/fr\/temoignages\/uclr-pneu-souple-sans-air\/","title":{"rendered":"Comment nous avons con\u00e7u un pneu souple et sans air pour Mars"},"content":{"rendered":"<div role=\"navigation\" aria-label=\"Table des mati\u00e8res\" class=\"simpletoc wp-block-simpletoc-toc\"><h2 class=\"simpletoc-title\">Table des mati\u00e8res<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#h-trois-concepts-trois-approches\">Trois concepts, trois approches<\/a>\n\n<\/li>\n<li><a href=\"#h-de-l-esquisse-au-modele-cao-final\">De l\u2019esquisse au mod\u00e8le CAO final<\/a>\n\n<\/li>\n<li><a href=\"#h-fabrication-reception-et-integration\">Fabrication, r\u00e9ception et int\u00e9gration<\/a>\n\n<\/li>\n<li><a href=\"#h-lecons-d-ingenierie\">Le\u00e7ons d\u2019ing\u00e9nierie<\/a>\n<\/li><\/ul><\/div>\n\n\n<p>L\u2019un des principaux d\u00e9fis de notre projet \u00e9tait la mobilit\u00e9 : comment fabriquer une roue fiable, anti-crevaison, capable de franchir des roches, des pentes et du sable, tout en respectant des contraintes strictes de poids et de dimension.<\/p>\n\n\n\n<p>Au lieu de recourir \u00e0 des pneus pneumatiques \u2014 sujets \u00e0 la d\u00e9faillance en environnement extr\u00eame \u2014 nous avons choisi de d\u00e9velopper une roue <strong>souple et sans air<\/strong>, capable d\u2019amortissement passif, l\u00e9g\u00e8re et fabriqu\u00e9e par proc\u00e9d\u00e9s additifs. Le projet est rapidement devenu plus qu\u2019un simple composant : une v\u00e9ritable \u00e9tude de cas m\u00ealant prise de d\u00e9cision technique, it\u00e9ration design et collaboration industrielle.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/close-up-erc-mars-yard-1024x682.jpg\" alt=\"Close-up of the ERC Mars Yard\" class=\"wp-image-112346\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/close-up-erc-mars-yard-1024x682.jpg 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/close-up-erc-mars-yard-300x200.jpg 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/close-up-erc-mars-yard-768x511.jpg 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/close-up-erc-mars-yard.jpg 1164w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/close-up-erc-mars-yard.jpg\" data-fancybox=\"gallery-114489\" data-caption=\"Gros plan du Mars Yard de l\u2019ERC\" aria-label=\"Ouvrir l&#039;image compl\u00e8te\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/close-up-erc-mars-yard.jpg\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Gros plan du Mars Yard de l\u2019ERC<\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-trois-concepts-trois-approches\"><strong><strong>Trois concepts, trois approches<\/strong><\/strong><\/h2>\n\n\n<p>Nous avons d\u00e9but\u00e9 par trois concepts distincts, chacun explorant des strat\u00e9gies structurelles et combinaisons de mat\u00e9riaux vari\u00e9s. Pour respecter la contrainte de diam\u00e8tre maximal (220\u202fmm) et de charge verticale (120\u202fN), chaque concept a \u00e9t\u00e9 \u00e9valu\u00e9 via mod\u00e9lisation CAO et analyse par \u00e9l\u00e9ments finis (FEA), en fonction du facteur de s\u00e9curit\u00e9, du poids, de la fabricabilit\u00e9 et de la r\u00e9ponse structurale sous charge.<\/p>\n\n\n<div class=\"custom-table-block table-with-white-space\" id=\"table-id-317\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-317\" placeholder=\"Rechercher...\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%; height: 168px;\">\n<tbody>\n<tr style=\"height: 72px;\">\n<td style=\"width: 25%; height: 72px;\"><strong>Concept<\/strong><\/td>\n<td style=\"width: 25%; height: 72px;\"><strong><b>1 : Noyau rigide + couche souple<\/b><\/strong><\/td>\n<td style=\"width: 25%; height: 72px;\"><b>2 : Nid d\u2019abeille monobloc<\/b><\/td>\n<td style=\"width: 25%; height: 72px;\"><b>3 : Assemblage modulaire<\/b><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 25%; height: 24px;\"><b>Description<\/b><\/td>\n<td style=\"width: 25%; height: 24px;\"><span style=\"font-weight: 400;\">Ce design combine un noyau en ABS avec une couche externe en TPU, assembl\u00e9s par ajustement serr\u00e9 \u2014 comme un pneu classique sur une jante.<\/span><\/td>\n<td style=\"width: 25%; height: 24px;\"><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Une conception monomat\u00e9riau et monobloc en TPU avec structure hexagonale pour une r\u00e9sistance <\/span><\/span>uniforme et une masse r\u00e9duite.<\/td>\n<td style=\"width: 25%; height: 24px;\"><span style=\"font-weight: 400;\">\u00c9galement bimati\u00e8re (TPU + ABS), mais avec la couche externe fix\u00e9e au noyau via des dents d\u2019embo\u00eetement \u2014 facilitant l\u2019entretien.<\/span><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 25%; height: 24px;\"><strong>Masse<\/strong><\/td>\n<td style=\"width: 25%; height: 24px;\">1.290 kg<\/td>\n<td style=\"width: 25%; height: 24px;\">1.095 kg<\/td>\n<td style=\"width: 25%; height: 24px;\">1.043 kg<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 25%; height: 24px;\"><b>Facteur de s\u00e9curit\u00e9 effectif<\/b><\/td>\n<td style=\"width: 25%; height: 24px;\"><span style=\"font-weight: 400;\">7,5 (avec une hypoth\u00e8se conservatrice de 0,5\u00d7 appliqu\u00e9e aux pi\u00e8ces imprim\u00e9es)<\/span><\/td>\n<td style=\"width: 25%; height: 24px;\">6.79<\/td>\n<td style=\"width: 25%; height: 24px;\">6.22<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 25%; height: 24px;\"><b>Avantage \/ Inconv\u00e9nient<\/b><\/td>\n<td style=\"width: 25%; height: 24px;\"><span style=\"font-weight: 400;\">Contraintes localis\u00e9es et risque de d\u00e9chirure au niveau de l\u2019ajustement par pression.<\/span><\/td>\n<td style=\"width: 25%; height: 24px;\"><span style=\"font-weight: 400;\">Fabrication simplifi\u00e9e, r\u00e9partition robuste des charges, meilleur contr\u00f4le de la d\u00e9formation.<\/span><\/td>\n<td style=\"width: 25%; height: 24px;\"><span style=\"font-weight: 400;\">D\u00e9formation non uniforme et risques de concentration de contraintes dus aux ar\u00eates vives.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n    <section class=\"article-slider-block\">\r\n        <div class=\"article-content-wrapper\">\r\n            <!-- Swiper -->\r\n            <div class=\"swiper mySwiper2 article-slider-display\">\r\n                <div class=\"swiper-wrapper\">\r\n                                                <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-1-cad.png\" alt=\"Concept 1 CAD (left) and \"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-1-cad.png\" data-fancybox=\"gallery\" data-caption=\"CAO du concept\u202f1 (gauche) et analyse en coupe transversale du concept\u202f1 (droite)\" aria-label=\"Open full image\">\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-1-cad.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"Concept 1 CAD (left) and \" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>CAO du concept\u202f1 (gauche) et analyse en coupe transversale du concept\u202f1 (droite)<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                                        <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-1.png\" alt=\"FEA study of Concept 1\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-1.png\" data-fancybox=\"gallery\" data-caption=\"\u00c9tude par \u00e9l\u00e9ments finis (FEA) du concept\u202f1\" aria-label=\"Open full image\">\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-1.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"FEA study of Concept 1\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>\u00c9tude par \u00e9l\u00e9ments finis (FEA) du concept\u202f1<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                                        <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-2-cad.png\" alt=\"Concept 2 CAD\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-2-cad.png\" data-fancybox=\"gallery\" data-caption=\"CAO du concept\u202f2\" aria-label=\"Open full image\">\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-2-cad.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"Concept 2 CAD\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>CAO du concept\u202f2<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                                        <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-2.png\" alt=\"FEA study of Concept 2\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-2.png\" data-fancybox=\"gallery\" data-caption=\"\u00c9tude par \u00e9l\u00e9ments finis (FEA) du concept\u202f2\" aria-label=\"Open full image\">\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-2.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"FEA study of Concept 2\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>\u00c9tude par \u00e9l\u00e9ments finis (FEA) du concept\u202f2<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                                        <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-3-cad.png\" alt=\"Concept 3 CAD\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-3-cad.png\" data-fancybox=\"gallery\" data-caption=\"CAO du concept\u202f3\" aria-label=\"Open full image\">\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-3-cad.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"Concept 3 CAD\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>CAO du concept\u202f3<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                                        <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-3.png\" alt=\"FEA study of Concept 3\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-3.png\" data-fancybox=\"gallery\" data-caption=\"\u00c9tude par \u00e9l\u00e9ments finis (FEA) du concept\u202f3\" aria-label=\"Open full image\">\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-3.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"FEA study of Concept 3\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>\u00c9tude par \u00e9l\u00e9ments finis (FEA) du concept\u202f3<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                            <\/div>\r\n            <\/div>\r\n            <div thumbsSlider=\"\" class=\"swiper mySwiper article-slider-list\">\r\n                <div class=\"swiper-wrapper\">\r\n                                            <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-1-cad.png\" alt=\"Concept 1 CAD (left) and \">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-1.png\" alt=\"FEA study of Concept 1\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-2-cad.png\" alt=\"Concept 2 CAD\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-2.png\" alt=\"FEA study of Concept 2\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/concept-3-cad.png\" alt=\"Concept 3 CAD\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/fea-study-of-concept-3.png\" alt=\"FEA study of Concept 3\">\r\n                        <\/div>\r\n                                        <\/div>\r\n            <\/div>\r\n        <\/div>\r\n    <\/section>\r\n    \n\n\n<p>Apr\u00e8s un benchmark via une matrice d\u00e9cisionnelle pond\u00e9r\u00e9e, <strong>le concept\u202f2<\/strong> a \u00e9t\u00e9 retenu pour son excellente manufacturabilit\u00e9 et son comportement pr\u00e9visible. Son design monomat\u00e9riau est parfaitement adapt\u00e9 \u00e0 la fabrication additive, et nous avons valid\u00e9 sa faisabilit\u00e9 d\u00e8s les premi\u00e8res \u00e9tapes via le moteur de <a href=\"https:\/\/get.xometry.eu\/?locale=fr\">devisi instantan\u00e9 de Xometry<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-de-l-esquisse-au-modele-cao-final\"><strong><strong>De l\u2019esquisse au mod\u00e8le CAO final<\/strong><\/strong><\/h2>\n\n\n<p>Une fois le concept\u202f2 s\u00e9lectionn\u00e9, nous avons affin\u00e9 le design pour r\u00e9pondre \u00e0 un cahier des charges pr\u00e9cis :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Diam\u00e8tre max<\/strong> : 220\u202fmm<\/li>\n\n\n\n<li><strong>Capacit\u00e9 de charge<\/strong> : 120\u202fN<\/li>\n\n\n\n<li><strong>Interface moteur<\/strong> : cavit\u00e9 encastr\u00e9e r\u00e9duisant l\u2019effet de levier<\/li>\n\n\n\n<li><strong>Motif<\/strong> : bande de roulement textur\u00e9e pour adh\u00e9rence<\/li>\n\n\n\n<li><strong>Protection partielle<\/strong> : d\u00e9flecteurs de poussi\u00e8re<\/li>\n\n\n\n<li><strong>Flexibilit\u00e9<\/strong> : d\u00e9formation \u00e9lastique pour amortissement<\/li>\n\n\n\n<li>Fabrication en une seule pi\u00e8ce pour minimiser les points de rupture<\/li>\n<\/ul>\n\n\n\n<p>La CAO finale int\u00e8gre un carter pour l\u2019axe moteur, une structure en nid d\u2019abeille pour la r\u00e9sistance, et un motif de bande de roulement optimis\u00e9 pour terrain plat ou inclin\u00e9.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"468\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/preliminary-design-cad-1024x468.png\" alt=\"Preliminary design CAD (left) and cross-section analysis of the preliminary design (right)\" class=\"wp-image-112430\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/preliminary-design-cad-1024x468.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/preliminary-design-cad-300x137.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/preliminary-design-cad-768x351.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/preliminary-design-cad-1536x702.png 1536w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/preliminary-design-cad-2048x936.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/preliminary-design-cad-scaled.png\" data-fancybox=\"gallery-114489\" data-caption=\"CAO de la conception pr\u00e9liminaire (gauche) et analyse en coupe transversale (droite)\" aria-label=\"Ouvrir l&#039;image compl\u00e8te\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/preliminary-design-cad-scaled.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">CAO de la conception pr\u00e9liminaire (gauche) et analyse en coupe transversale (droite)<\/figcaption><\/figure>\n\n\n\n<p>Nous avons ensuite sollicit\u00e9 les ing\u00e9nieurs de Xometry pour une revue design professionnelle. Leurs retours nous ont pouss\u00e9s \u00e0 effectuer les ajustements suivants :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>R\u00e9seau interne optimis\u00e9<\/strong> : uniformisation du treillis selon un agencement radial inspir\u00e9 du <a href=\"https:\/\/www.michelin.fr\/why-michelin\/sustainability\/prototype-michelin-uptis\">prototype Michelin Uptis<\/a>.<\/li>\n\n\n\n<li><strong>Suppression des d\u00e9bords partiels<\/strong> : pour \u00e9viter l\u2019accumulation de poussi\u00e8res et am\u00e9liorer l\u2019esth\u00e9tique.<\/li>\n\n\n\n<li><strong>Optimisation de la bande de roulement<\/strong> : hauteur r\u00e9duite et motif sym\u00e9trique pour une usure uniforme.<\/li>\n\n\n\n<li><strong>Ajustement de la duret\u00e9<\/strong> : choix du TPU EOS\u202f1301 (Shore\u202f86A) pour un bon compromis entre souplesse, absorption des impacts, r\u00e9sistance UV et compatibilit\u00e9 avec le proc\u00e9d\u00e9 d\u2019impression 3D SLS.<\/li>\n<\/ul>\n\n\n\n<p>Tous ces \u00e9l\u00e9ments ont \u00e9t\u00e9 int\u00e9gr\u00e9s dans la CAO finale : treillis interne uniforme, int\u00e9gration du moteur, motif de bande de roulement sym\u00e9trique, et abandon complet des protections partielles.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"2560\" height=\"1037\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-scaled.png\" alt=\"Final design CAD\" class=\"wp-image-112466\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-scaled.png 2560w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-300x122.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-1024x415.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-768x311.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-1536x622.png 1536w, https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-2048x830.png 2048w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-scaled.png\" data-fancybox=\"gallery-114489\" data-caption=\"CAO de la conception finale\" aria-label=\"Ouvrir l&#039;image compl\u00e8te\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/final-cad-design-edited-scaled.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">CAO de la conception finale<\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-fabrication-reception-et-integration\"><strong><strong>Fabrication, r\u00e9ception et int\u00e9gration<\/strong><\/strong><\/h2>\n\n\n<p>Avec le mod\u00e8le CAO finalis\u00e9, nous avons soumis la pi\u00e8ce pour un second devis via la plateforme Xometry. Le TPU\u202f1301 n\u2019\u00e9tant pas encore r\u00e9f\u00e9renc\u00e9, nous avons choisi \u201cTPU\u201d dans le menu et pr\u00e9cis\u00e9 le mat\u00e9riau exact dans les commentaires. Gr\u00e2ce au sponsoring \u00e0 80\u202f% de Xometry, nous avons produit les six roues sans d\u00e9passer notre budget \u00e9tudiant.<\/p>\n\n\n\n<p>Livr\u00e9es en f\u00e9vrier, les roues pr\u00e9sentaient une qualit\u00e9 exceptionnelle : une pr\u00e9cision dimensionnelle conforme, une souplesse parfaite et aucune d\u00e9formation notable. Apr\u00e8s tests de flexion, nous les avons mont\u00e9es sur le ch\u00e2ssis : l\u2019encastrement sur l\u2019axe moteur \u00e9tait impeccable, et la structure en nid d\u2019abeille a fourni l\u2019amortissement attendu.<\/p>\n\n\n    <section class=\"article-slider-block\">\r\n        <div class=\"article-content-wrapper\">\r\n            <!-- Swiper -->\r\n            <div class=\"swiper mySwiper2 article-slider-display\">\r\n                <div class=\"swiper-wrapper\">\r\n                                                <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/manufactured-wheels-edited.png\" alt=\"\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/manufactured-wheels-edited.png\" data-fancybox=\"gallery\" data-caption=\"Roue imprim\u00e9e en 3D\" aria-label=\"Ouvrir l&#039;image compl\u00e8te\"0>\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/manufactured-wheels-edited.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>Roue imprim\u00e9e en 3D<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                                        <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/3d-printed-wheel-ucl.png\" alt=\"\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/3d-printed-wheel-ucl.png\" data-fancybox=\"gallery\" data-caption=\"Roue imprim\u00e9e en 3D\" aria-label=\"Ouvrir l&#039;image compl\u00e8te\"1>\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/3d-printed-wheel-ucl.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>Roue imprim\u00e9e en 3D<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                                        <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/rover-3d-printed-wheels-ucl.png\" alt=\"\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/rover-3d-printed-wheels-ucl.png\" data-fancybox=\"gallery\" data-caption=\"Rover \u00e9quip\u00e9 de la roue imprim\u00e9e en 3D\" aria-label=\"Ouvrir l&#039;image compl\u00e8te\"2>\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/rover-3d-printed-wheels-ucl.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p><span style=\"font-weight: 400;\">Rover \u00e9quip\u00e9 de la roue imprim\u00e9e en 3D<\/span><\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                            <\/div>\r\n            <\/div>\r\n            <div thumbsSlider=\"\" class=\"swiper mySwiper article-slider-list\">\r\n                <div class=\"swiper-wrapper\">\r\n                                            <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/manufactured-wheels-edited.png\" alt=\"\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/3d-printed-wheel-ucl.png\" alt=\"\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2025\/06\/rover-3d-printed-wheels-ucl.png\" alt=\"\">\r\n                        <\/div>\r\n                                        <\/div>\r\n            <\/div>\r\n        <\/div>\r\n    <\/section>\r\n    \n\n<h2 class=\"wp-block-heading\" id=\"h-lecons-d-ingenierie\"><strong><strong>Le\u00e7ons d\u2019ing\u00e9nierie<\/strong><\/strong><\/h2>\n\n\n<p>Ce projet a \u00e9t\u00e9 bien plus qu\u2019un simple exercice acad\u00e9mique : un v\u00e9ritable apprentissage sur le terrain. Voici les principaux enseignements :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>La sym\u00e9trie structurale est essentielle<\/strong> : une r\u00e9partition in\u00e9gale des masses entra\u00eene des comportements impr\u00e9visibles. La sym\u00e9trie radiale assure meilleure fiabilit\u00e9.<\/li>\n\n\n\n<li><strong>La g\u00e9om\u00e9trie de bande de roulement est cruciale<\/strong> : \u00e9quilibre d\u00e9licat entre adh\u00e9rence, usure et facilit\u00e9 de fabrication.<\/li>\n\n\n\n<li><strong>La duret\u00e9 Shore est d\u00e9terminante<\/strong> : garantir la souplesse sans effondrement structurel, un param\u00e8tre d\u00e9cisif.<\/li>\n\n\n\n<li><strong>Le design pour la fabrication est indispensable<\/strong> : collaborer d\u00e8s le d\u00e9part avec un fournisseur comme Xometry permet d\u2019aligner le design sur les contraintes r\u00e9elles, pas seulement sur une mod\u00e9lisation \u00e9cran.<\/li>\n<\/ul>\n\n\n\n<p>Ces roues seront prochainement soumises \u00e0 de nouveaux tests terrain en vue de l\u2019ERC. Quel que soit le r\u00e9sultat en comp\u00e9tition, nous consid\u00e9rons d\u00e9j\u00e0 comme un succ\u00e8s d\u2019avoir con\u00e7u un composant r\u00e9pondant aux sp\u00e9cifications techniques, produit via des cha\u00eenes professionnelles, et riche d\u2019enseignements op\u00e9rationnels rarement acquis sans passer par le terrain.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-alpha-channel-opacity has-background\" style=\"background-color:#f5f7f8;color:#f5f7f8\"\/>\n\n\n\n<p><strong>Et vous ? Auriez-vous proc\u00e9d\u00e9 autrement ? 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