{"id":803,"date":"2026-06-02T06:56:04","date_gmt":"2026-06-02T06:56:04","guid":{"rendered":"https:\/\/www.coefficientfriction.com\/?page_id=803"},"modified":"2026-06-02T07:58:58","modified_gmt":"2026-06-02T07:58:58","slug":"astm-g143","status":"publish","type":"page","link":"https:\/\/www.coefficientfriction.com\/pt\/astm-g143","title":{"rendered":"ASTM G143"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"803\" class=\"elementor elementor-803\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d704b83 e-flex e-con-boxed e-con e-parent\" data-id=\"d704b83\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d2347d4 e-con-full e-flex e-con e-child\" data-id=\"d2347d4\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4aa5d8c elementor-widget elementor-widget-image\" data-id=\"4aa5d8c\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"100\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2026\/06\/ASTM-G143.webp\" class=\"attachment-large size-large wp-image-805\" alt=\"ASTM G143\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2026\/06\/ASTM-G143.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2026\/06\/ASTM-G143-18x6.webp 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-451ac2e elementor-widget elementor-widget-heading\" data-id=\"451ac2e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">ASTM G143<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-86af503 elementor-widget elementor-widget-heading\" data-id=\"86af503\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">M\u00e9todo de ensaio normalizado para a medi\u00e7\u00e3o das carater\u00edsticas de fric\u00e7\u00e3o da banda\/rolo<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b5ebfc9 e-con-full e-flex e-con e-child\" data-id=\"b5ebfc9\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c7c7559 elementor-widget elementor-widget-text-editor\" data-id=\"c7c7559\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"429\" data-end=\"858\"><strong data-start=\"429\" data-end=\"442\">ASTM G143<\/strong> \u00e9 um m\u00e9todo de ensaio normalizado utilizado para avaliar o comportamento de fric\u00e7\u00e3o entre um material de banda flex\u00edvel e uma superf\u00edcie de rolo cil\u00edndrico. O m\u00e9todo mede o coeficiente de atrito est\u00e1tico e cin\u00e9tico (COF) durante o contacto de deslizamento e ajuda os fabricantes a compreender a forma como os materiais da banda interagem com os rolos nas opera\u00e7\u00f5es de convers\u00e3o, impress\u00e3o, embalagem, revestimento, lamina\u00e7\u00e3o e outras opera\u00e7\u00f5es de processamento cont\u00ednuo da banda.<\/p><p data-start=\"860\" data-end=\"1233\">Ao contr\u00e1rio dos ensaios convencionais de fric\u00e7\u00e3o em superf\u00edcies planas, o ASTM G143 centra-se especificamente em <strong data-start=\"943\" data-end=\"978\">medi\u00e7\u00e3o do atrito entre rolos e banda<\/strong>, O sistema de medi\u00e7\u00e3o de atrito \u00e9 um sistema de controlo de atrito que simula condi\u00e7\u00f5es reais de produ\u00e7\u00e3o em que pel\u00edculas, papel, folhas, t\u00eaxteis e outros materiais flex\u00edveis se deslocam atrav\u00e9s de rolos. Os dados de fric\u00e7\u00e3o resultantes podem ser utilizados para otimiza\u00e7\u00e3o de processos, desenvolvimento de materiais, conce\u00e7\u00e3o de equipamentos e controlo de qualidade.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-77d973a e-flex e-con-boxed e-con e-parent\" data-id=\"77d973a\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-29344a9 elementor-widget elementor-widget-heading\" data-id=\"29344a9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Porque \u00e9 que os testes ASTM G143 s\u00e3o importantes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c31e0c9 elementor-widget elementor-widget-text-editor\" data-id=\"c31e0c9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"1279\" data-end=\"1488\">Em muitos processos de fabrico, os materiais flex\u00edveis s\u00e3o transportados atrav\u00e9s de uma s\u00e9rie de rolos de tra\u00e7\u00e3o e de rolos de apoio. As carater\u00edsticas de fric\u00e7\u00e3o entre a banda e o rolo influenciam diretamente o desempenho da m\u00e1quina.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-19f63ba e-con-full e-grid e-con e-child\" data-id=\"19f63ba\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3354326 elementor-widget elementor-widget-text-editor\" data-id=\"3354326\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"1490\" data-end=\"1513\">Se o atrito for demasiado baixo:<\/p><ul data-start=\"1515\" data-end=\"1640\"><li data-section-id=\"g7o52g\" data-start=\"1515\" data-end=\"1545\">O material pode escorregar nos rolos<\/li><li data-section-id=\"11psfe7\" data-start=\"1546\" data-end=\"1577\">Podem ocorrer erros de registo<\/li><li data-section-id=\"kaueoe\" data-start=\"1578\" data-end=\"1612\">O rastreio da Web pode tornar-se inst\u00e1vel<\/li><li data-section-id=\"1wb1y50\" data-start=\"1613\" data-end=\"1640\">Podem ocorrer danos no produto<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2467481 elementor-widget elementor-widget-text-editor\" data-id=\"2467481\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"1642\" data-end=\"1666\">Se o atrito for demasiado elevado:<\/p><ul data-start=\"1668\" data-end=\"1818\"><li data-section-id=\"1gocjer\" data-start=\"1668\" data-end=\"1703\">Podem desenvolver-se cargas excessivas no motor<\/li><li data-section-id=\"13zh7hq\" data-start=\"1704\" data-end=\"1744\">Podem ocorrer problemas de dire\u00e7\u00e3o e seguimento<\/li><li data-section-id=\"10tu6rr\" data-start=\"1745\" data-end=\"1774\">Os danos na superf\u00edcie podem aumentar<\/li><li data-section-id=\"8inqks\" data-start=\"1775\" data-end=\"1818\">A efici\u00eancia do manuseamento de materiais pode diminuir<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9adc4f5 elementor-widget elementor-widget-text-editor\" data-id=\"9adc4f5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Ao efetuar uma <strong data-start=\"1837\" data-end=\"1879\">Ensaio do coeficiente de atrito ASTM G143<\/strong>, Com esta ferramenta, os fabricantes podem quantificar a intera\u00e7\u00e3o rolo\/trama e tomar decis\u00f5es informadas relativamente \u00e0 sele\u00e7\u00e3o de materiais, revestimentos de rolos, lubrificantes e par\u00e2metros de processo.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4712be6 e-flex e-con-boxed e-con e-parent\" data-id=\"4712be6\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a8dc215 elementor-widget elementor-widget-heading\" data-id=\"a8dc215\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">O que \u00e9 medido na ASTM G143?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3233171 elementor-widget elementor-widget-text-editor\" data-id=\"3233171\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"2083\" data-end=\"2103\">O teste determina:<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2105\" data-end=\"2516\"><thead data-start=\"2105\" data-end=\"2132\"><tr data-start=\"2105\" data-end=\"2132\"><th class=\"last:pe-10\" data-start=\"2105\" data-end=\"2117\" data-col-size=\"md\">Par\u00e2metro<\/th><th class=\"last:pe-10\" data-start=\"2117\" data-end=\"2132\" data-col-size=\"md\">Descri\u00e7\u00e3o<\/th><\/tr><\/thead><tbody data-start=\"2162\" data-end=\"2516\"><tr data-start=\"2162\" data-end=\"2251\"><td style=\"text-align: center;\" data-start=\"2162\" data-end=\"2208\" data-col-size=\"md\">Coeficiente de atrito est\u00e1tico (COF est\u00e1tico)<\/td><td style=\"text-align: center;\" data-start=\"2208\" data-end=\"2251\" data-col-size=\"md\">Resist\u00eancia ao in\u00edcio do deslizamento<\/td><\/tr><tr data-start=\"2252\" data-end=\"2340\"><td style=\"text-align: center;\" data-start=\"2252\" data-end=\"2300\" data-col-size=\"md\">Coeficiente de atrito cin\u00e9tico (Dynamic COF)<\/td><td style=\"text-align: center;\" data-start=\"2300\" data-end=\"2340\" data-col-size=\"md\">Resist\u00eancia durante o deslizamento cont\u00ednuo<\/td><\/tr><tr data-start=\"2341\" data-end=\"2408\"><td style=\"text-align: center;\" data-start=\"2341\" data-end=\"2358\" data-col-size=\"md\">For\u00e7a de fric\u00e7\u00e3o<\/td><td style=\"text-align: center;\" data-start=\"2358\" data-end=\"2408\" data-col-size=\"md\">For\u00e7a necess\u00e1ria para deslocar a banda sobre o rolo<\/td><\/tr><tr data-start=\"2409\" data-end=\"2516\"><td style=\"text-align: center;\" data-start=\"2409\" data-end=\"2450\" data-col-size=\"md\">Carater\u00edsticas da intera\u00e7\u00e3o rolo\/trama<\/td><td style=\"text-align: center;\" data-start=\"2450\" data-end=\"2516\" data-col-size=\"md\">Comportamento geral do atrito em condi\u00e7\u00f5es de funcionamento simuladas<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"2518\" data-end=\"2570\">Estas medi\u00e7\u00f5es fornecem informa\u00e7\u00f5es valiosas para:<\/p><ul data-start=\"2572\" data-end=\"2702\"><li data-section-id=\"1o2zig4\" data-start=\"2572\" data-end=\"2589\">Controlo de processos<\/li><li data-section-id=\"hdv7ya\" data-start=\"2590\" data-end=\"2608\">Sele\u00e7\u00e3o de rolos<\/li><li data-section-id=\"11vjoz6\" data-start=\"2609\" data-end=\"2637\">Avalia\u00e7\u00e3o do revestimento da superf\u00edcie<\/li><li data-section-id=\"1gsp2x2\" data-start=\"2638\" data-end=\"2660\">Avalia\u00e7\u00e3o dos lubrificantes<\/li><li data-section-id=\"1wzx7yo\" data-start=\"2661\" data-end=\"2682\">Desenvolvimento de produtos<\/li><li data-section-id=\"1y5e8wa\" data-start=\"2683\" data-end=\"2702\">Garantia de qualidade<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2944a56 e-flex e-con-boxed e-con e-parent\" data-id=\"2944a56\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b28608e elementor-widget elementor-widget-heading\" data-id=\"b28608e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Princ\u00edpio de ensaio da ASTM G143<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-829d028 elementor-widget elementor-widget-text-editor\" data-id=\"829d028\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"2744\" data-end=\"2833\">O <strong data-start=\"2748\" data-end=\"2789\">m\u00e9todo de ensaio cof de sistemas de trama de rolos<\/strong> baseia-se no princ\u00edpio de fric\u00e7\u00e3o do cabrestante.<\/p><p data-start=\"2835\" data-end=\"3060\">Uma tira estreita de material em banda \u00e9 enrolada \u00e0 volta de um rolo cil\u00edndrico estacion\u00e1rio num \u00e2ngulo de enrolamento especificado. Uma extremidade do esp\u00e9cime \u00e9 fixada a um dispositivo de medi\u00e7\u00e3o de for\u00e7a enquanto uma tens\u00e3o conhecida \u00e9 aplicada \u00e0 extremidade oposta.<\/p><p data-start=\"3062\" data-end=\"3279\">\u00c0 medida que a amostra desliza sobre a superf\u00edcie do rolo, a for\u00e7a necess\u00e1ria para vencer o atrito \u00e9 medida continuamente. Os coeficientes de atrito est\u00e1tico e cin\u00e9tico s\u00e3o ent\u00e3o calculados a partir dos valores de tens\u00e3o medidos.<\/p><p data-start=\"3281\" data-end=\"3330\">O c\u00e1lculo baseia-se na equa\u00e7\u00e3o do cabrestante:<\/p><div style=\"display: flex; align-items: center; justify-content: center; font-family: 'Times New Roman', Times, serif; font-size: 1.3rem; font-style: italic;\"><p><span style=\"margin-right: 8px; font-size: 1.4rem;\">\u03bc =<\/span><\/p><div style=\"display: flex; flex-direction: column; align-items: center; text-align: center;\"><p><span style=\"padding: 0 4px; line-height: 1.2;\">ln(T<sub>2<\/sub>\/T<sub>1<\/sub>)<\/span><\/p><div style=\"width: 100%; height: 1px; background-color: #000; margin: 2px 0;\">\u00a0<\/div><p><span style=\"padding: 0 4px; line-height: 1.2;\">\u03b8<\/span><\/p><\/div><\/div><p data-start=\"3371\" data-end=\"3377\">Onde:<\/p><ul data-start=\"3379\" data-end=\"3491\"><li data-section-id=\"m1vref\" data-start=\"3379\" data-end=\"3408\">\u03bc = coeficiente de atrito<\/li><li data-section-id=\"127wvr7\" data-start=\"3409\" data-end=\"3436\">T\u2082 = for\u00e7a de tens\u00e3o mais elevada<\/li><li data-section-id=\"1s18gq\" data-start=\"3437\" data-end=\"3463\">T\u2081 = for\u00e7a de tens\u00e3o inferior<\/li><li data-section-id=\"1wh7x0d\" data-start=\"3464\" data-end=\"3491\">\u03b8 = \u00e2ngulo de enrolamento em radianos<\/li><\/ul><p data-start=\"3493\" data-end=\"3613\">Esta abordagem permite a simula\u00e7\u00e3o realista de sistemas de transporte em rede, normalmente utilizados em ambientes de produ\u00e7\u00e3o industrial.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-eb9d24d e-flex e-con-boxed e-con e-parent\" data-id=\"eb9d24d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-153eddc elementor-widget elementor-widget-heading\" data-id=\"153eddc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Procedimento de ensaio ASTM G143<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-340b2af elementor-widget elementor-widget-heading\" data-id=\"340b2af\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Prepara\u00e7\u00e3o do esp\u00e9cime<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e33d0fb elementor-widget elementor-widget-text-editor\" data-id=\"e33d0fb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"3675\" data-end=\"3737\">A prepara\u00e7\u00e3o adequada das amostras \u00e9 essencial para obter resultados fi\u00e1veis.<\/p><p data-start=\"3739\" data-end=\"3775\">As dimens\u00f5es t\u00edpicas dos provetes incluem:<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"3777\" data-end=\"3902\"><thead data-start=\"3777\" data-end=\"3806\"><tr data-start=\"3777\" data-end=\"3806\"><th class=\"last:pe-10\" data-start=\"3777\" data-end=\"3789\" data-col-size=\"sm\">Par\u00e2metro<\/th><th class=\"last:pe-10\" data-start=\"3789\" data-end=\"3806\" data-col-size=\"sm\">Valor t\u00edpico<\/th><\/tr><\/thead><tbody data-start=\"3838\" data-end=\"3902\"><tr data-start=\"3838\" data-end=\"3855\"><td style=\"text-align: center;\" data-start=\"3838\" data-end=\"3846\" data-col-size=\"sm\">Largura<\/td><td style=\"text-align: center;\" data-start=\"3846\" data-end=\"3855\" data-col-size=\"sm\">25 mm<\/td><\/tr><tr data-start=\"3856\" data-end=\"3875\"><td style=\"text-align: center;\" data-start=\"3856\" data-end=\"3865\" data-col-size=\"sm\">Comprimento<\/td><td style=\"text-align: center;\" data-start=\"3865\" data-end=\"3875\" data-col-size=\"sm\">500 mm<\/td><\/tr><tr data-start=\"3876\" data-end=\"3902\"><td style=\"text-align: center;\" data-start=\"3876\" data-end=\"3897\" data-col-size=\"sm\">M\u00ednimo de r\u00e9plicas<\/td><td style=\"text-align: center;\" data-start=\"3897\" data-end=\"3902\" data-col-size=\"sm\">3<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"3904\" data-end=\"3929\">Considera\u00e7\u00f5es importantes:<\/p><ul data-start=\"3931\" data-end=\"4160\"><li data-section-id=\"1c5a4z2\" data-start=\"3931\" data-end=\"3971\">Utilizar material virgem sempre que poss\u00edvel.<\/li><li data-section-id=\"exqdfq\" data-start=\"3972\" data-end=\"4003\">Evitar tocar nas superf\u00edcies de ensaio.<\/li><li data-section-id=\"1oxoehj\" data-start=\"4004\" data-end=\"4038\">Evitar rebarbas nos bordos dos esp\u00e9cimes.<\/li><li data-section-id=\"u5y54f\" data-start=\"4039\" data-end=\"4080\">Manter uma orienta\u00e7\u00e3o coerente das amostras.<\/li><li data-section-id=\"ph4enw\" data-start=\"4081\" data-end=\"4160\">Ensaiar os materiais no seu estado de fabrico, salvo indica\u00e7\u00e3o em contr\u00e1rio.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e204845 elementor-widget elementor-widget-heading\" data-id=\"e204845\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Montagem de esp\u00e9cimes<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87800b5 elementor-widget elementor-widget-text-editor\" data-id=\"87800b5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"4190\" data-end=\"4217\">O esp\u00e9cime \u00e9 montado por:<\/p><ol data-start=\"4219\" data-end=\"4422\"><li data-section-id=\"ewfbck\" data-start=\"4219\" data-end=\"4264\">Fixa\u00e7\u00e3o de uma extremidade ao transdutor de for\u00e7a.<\/li><li data-section-id=\"z89xu0\" data-start=\"4265\" data-end=\"4310\">Colocar o provete sobre o rolo de ensaio.<\/li><li data-section-id=\"eijcwt\" data-start=\"4311\" data-end=\"4355\">Aplicar o peso de tensionamento especificado.<\/li><li data-section-id=\"1a3d3a3\" data-start=\"4356\" data-end=\"4385\">Assegurar um alinhamento correto.<\/li><li data-section-id=\"59uekt\" data-start=\"4386\" data-end=\"4422\">Evitar dobras ou rugas acentuadas.<\/li><\/ol><p data-start=\"4424\" data-end=\"4498\">A montagem correta minimiza a variabilidade dos ensaios e melhora a repetibilidade.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7915411 elementor-widget elementor-widget-heading\" data-id=\"7915411\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Defini\u00e7\u00e3o de par\u00e2metros de deslizamento<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f32668 elementor-widget elementor-widget-text-editor\" data-id=\"3f32668\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4 data-start=\"4537\" data-end=\"4558\">Velocidade de deslizamento<\/h4><p data-start=\"4560\" data-end=\"4639\">A ASTM G143 recomenda a sele\u00e7\u00e3o de velocidades que simulem a aplica\u00e7\u00e3o real.<\/p><p data-start=\"4641\" data-end=\"4679\">As velocidades de ensaio t\u00edpicas variam entre:<\/p><ul data-start=\"4681\" data-end=\"4785\"><li data-section-id=\"1245gj7\" data-start=\"4681\" data-end=\"4730\">5 mm\/min a 100 mm\/min para simula\u00e7\u00f5es de baixo deslizamento<\/li><li data-section-id=\"17qfci2\" data-start=\"4731\" data-end=\"4785\">Velocidades mais elevadas quando exigidas por aplica\u00e7\u00f5es espec\u00edficas<\/li><\/ul><p data-start=\"4787\" data-end=\"4865\">Sempre que poss\u00edvel, a sele\u00e7\u00e3o da velocidade deve refletir as condi\u00e7\u00f5es reais de funcionamento.<\/p><h4 data-start=\"4867\" data-end=\"4888\">Dist\u00e2ncia de deslizamento<\/h4><p data-start=\"4890\" data-end=\"4919\">Para a determina\u00e7\u00e3o do COF est\u00e1tico:<\/p><ul data-start=\"4921\" data-end=\"4968\"><li data-section-id=\"7skj74\" data-start=\"4921\" data-end=\"4968\">O deslizamento pode parar pouco depois do in\u00edcio do movimento.<\/li><\/ul><p data-start=\"4970\" data-end=\"5011\">Para a determina\u00e7\u00e3o est\u00e1tica e cin\u00e9tica do COF:<\/p><ul data-start=\"5013\" data-end=\"5056\"><li data-section-id=\"1c1xel6\" data-start=\"5013\" data-end=\"5056\">S\u00e3o recomendadas dist\u00e2ncias de deslizamento mais longas.<\/li><\/ul><p data-start=\"5058\" data-end=\"5101\">Estudos interlaboratoriais ASTM habitualmente utilizados:<\/p><ul data-start=\"5103\" data-end=\"5128\"><li data-section-id=\"187g27h\" data-start=\"5103\" data-end=\"5128\">150 mm de dist\u00e2ncia de deslizamento<\/li><\/ul><h4 data-start=\"5130\" data-end=\"5146\">Tens\u00e3o da rede<\/h4><p data-start=\"5148\" data-end=\"5203\">A tens\u00e3o da banda deve representar as condi\u00e7\u00f5es reais do processo.<\/p><p data-start=\"5205\" data-end=\"5233\">Os testes t\u00edpicos podem envolver:<\/p><ul data-start=\"5235\" data-end=\"5343\"><li data-section-id=\"xfes7t\" data-start=\"5235\" data-end=\"5260\">V\u00e1rios n\u00edveis de tens\u00e3o<\/li><li data-section-id=\"djbt3f\" data-start=\"5261\" data-end=\"5307\">Tens\u00e3o m\u00e1xima at\u00e9 150 N numa tira de 25 mm<\/li><li data-section-id=\"3opu6w\" data-start=\"5308\" data-end=\"5343\">Estudos de repetibilidade em torno de 45 N<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49de134 elementor-widget elementor-widget-heading\" data-id=\"49de134\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Defini\u00e7\u00e3o de par\u00e2metros de deslizamento<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eccdb39 elementor-widget elementor-widget-text-editor\" data-id=\"eccdb39\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"5369\" data-end=\"5428\">O \u00e2ngulo de enrolamento afecta significativamente os c\u00e1lculos de atrito.<\/p><p data-start=\"5430\" data-end=\"5452\">Os valores comuns incluem:<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"5454\" data-end=\"5612\"><thead data-start=\"5454\" data-end=\"5482\"><tr data-start=\"5454\" data-end=\"5482\"><th class=\"last:pe-10\" data-start=\"5454\" data-end=\"5467\" data-col-size=\"sm\">\u00c2ngulo de enrolamento<\/th><th class=\"last:pe-10\" data-start=\"5467\" data-end=\"5482\" data-col-size=\"sm\">Aplica\u00e7\u00e3o<\/th><\/tr><\/thead><tbody data-start=\"5512\" data-end=\"5612\"><tr data-start=\"5512\" data-end=\"5546\"><td data-start=\"5512\" data-end=\"5518\" data-col-size=\"sm\">90\u00b0<\/td><td data-start=\"5518\" data-end=\"5546\" data-col-size=\"sm\">Recomendado pela ASTM G143<\/td><\/tr><tr data-start=\"5547\" data-end=\"5573\"><td data-start=\"5547\" data-end=\"5554\" data-col-size=\"sm\">180\u00b0<\/td><td data-start=\"5554\" data-end=\"5573\" data-col-size=\"sm\">M\u00e1ximo autorizado<\/td><\/tr><tr data-start=\"5574\" data-end=\"5612\"><td data-start=\"5574\" data-end=\"5590\" data-col-size=\"sm\">\u00c2ngulos personalizados<\/td><td data-start=\"5590\" data-end=\"5612\" data-col-size=\"sm\">Simula\u00e7\u00e3o de processos<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"5614\" data-end=\"5697\">Um \u00e2ngulo de enrolamento de 90\u00b0 \u00e9 amplamente utilizado porque equilibra praticidade e repetibilidade.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-13318d3 e-flex e-con-boxed e-con e-parent\" data-id=\"13318d3\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2583bec elementor-widget elementor-widget-heading\" data-id=\"2583bec\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ASTM G143 vs. ASTM D1894<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c0cc36 elementor-widget elementor-widget-text-editor\" data-id=\"8c0cc36\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"7124\" data-end=\"7169\">Muitos utilizadores comparam a ASTM G143 com <a href=\"https:\/\/www.coefficientfriction.com\/pt\/astm-d1894\/\" target=\"_blank\" rel=\"noopener\">ASTM D1894<\/a>.<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"7171\" data-end=\"7517\"><thead data-start=\"7171\" data-end=\"7207\"><tr data-start=\"7171\" data-end=\"7207\"><th class=\"last:pe-10\" data-start=\"7171\" data-end=\"7181\" data-col-size=\"sm\">Carater\u00edstica<\/th><th class=\"last:pe-10\" data-start=\"7181\" data-end=\"7193\" data-col-size=\"sm\">ASTM G143<\/th><th class=\"last:pe-10\" data-start=\"7193\" data-end=\"7207\" data-col-size=\"sm\">ASTM D1894<\/th><\/tr><\/thead><tbody data-start=\"7246\" data-end=\"7517\"><tr data-start=\"7246\" data-end=\"7294\"><td style=\"text-align: center;\" data-start=\"7246\" data-end=\"7265\" data-col-size=\"sm\">Geometria de contacto<\/td><td style=\"text-align: center;\" data-start=\"7265\" data-end=\"7278\" data-col-size=\"sm\">Roller-Web<\/td><td style=\"text-align: center;\" data-start=\"7278\" data-end=\"7294\" data-col-size=\"sm\">Superf\u00edcie plana<\/td><\/tr><tr data-start=\"7295\" data-end=\"7370\"><td style=\"text-align: center;\" data-start=\"7295\" data-end=\"7317\" data-col-size=\"sm\">Aplica\u00e7\u00e3o prim\u00e1ria<\/td><td style=\"text-align: center;\" data-start=\"7317\" data-end=\"7341\" data-col-size=\"sm\">Sistemas de transporte Web<\/td><td style=\"text-align: center;\" data-start=\"7341\" data-end=\"7370\" data-col-size=\"sm\">Atrito geral do material<\/td><\/tr><tr data-start=\"7371\" data-end=\"7418\"><td style=\"text-align: center;\" data-start=\"7371\" data-end=\"7388\" data-col-size=\"sm\">Modelo de fric\u00e7\u00e3o<\/td><td style=\"text-align: center;\" data-start=\"7388\" data-end=\"7404\" data-col-size=\"sm\">Baseado em cabrestante<\/td><td style=\"text-align: center;\" data-start=\"7404\" data-end=\"7418\" data-col-size=\"sm\">Baseado em tren\u00f3<\/td><\/tr><tr data-start=\"7419\" data-end=\"7459\"><td style=\"text-align: center;\" data-start=\"7419\" data-end=\"7440\" data-col-size=\"sm\">Simula\u00e7\u00e3o de processos<\/td><td style=\"text-align: center;\" data-start=\"7440\" data-end=\"7447\" data-col-size=\"sm\">Elevado<\/td><td style=\"text-align: center;\" data-start=\"7447\" data-end=\"7459\" data-col-size=\"sm\">Moderado<\/td><\/tr><tr data-start=\"7460\" data-end=\"7517\"><td style=\"text-align: center;\" data-start=\"7460\" data-end=\"7488\" data-col-size=\"sm\">Avalia\u00e7\u00e3o da pel\u00edcula de embalagem<\/td><td style=\"text-align: center;\" data-start=\"7488\" data-end=\"7500\" data-col-size=\"sm\">Excelente<\/td><td style=\"text-align: center;\" data-start=\"7500\" data-end=\"7517\" data-col-size=\"sm\">Comumente usado<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"7519\" data-end=\"7680\">O m\u00e9todo ASTM D1894 continua a ser o m\u00e9todo COF de pel\u00edcula de embalagem mais utilizado, enquanto o ASTM G143 fornece uma simula\u00e7\u00e3o mais realista de ambientes de produ\u00e7\u00e3o com rolos.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2611852 e-flex e-con-boxed e-con e-parent\" data-id=\"2611852\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-7e3a05c e-con-full e-flex e-con e-child\" data-id=\"7e3a05c\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b0a9a8c elementor-widget elementor-widget-heading\" data-id=\"b0a9a8c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Equipamento para ensaios ASTM G143<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8ccf38 elementor-widget elementor-widget-text-editor\" data-id=\"c8ccf38\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"7723\" data-end=\"7761\">A realiza\u00e7\u00e3o de testes ASTM G143 requer:<\/p><ul data-start=\"7763\" data-end=\"7965\"><li data-section-id=\"1ypbcdl\" data-start=\"7763\" data-end=\"7792\">Medi\u00e7\u00e3o de for\u00e7a de precis\u00e3o<\/li><li data-section-id=\"uaac5\" data-start=\"7793\" data-end=\"7818\">Desloca\u00e7\u00e3o controlada<\/li><li data-section-id=\"1qgmycu\" data-start=\"7819\" data-end=\"7842\">Velocidade de teste ajust\u00e1vel<\/li><li data-section-id=\"p6pqox\" data-start=\"7843\" data-end=\"7872\">Capacidade de aquisi\u00e7\u00e3o de dados<\/li><li data-section-id=\"1535ikj\" data-start=\"7873\" data-end=\"7902\">Dispositivos de fixa\u00e7\u00e3o de rolos especializados<\/li><li data-section-id=\"rojj7b\" data-start=\"7903\" data-end=\"7940\">Configura\u00e7\u00e3o ajust\u00e1vel do \u00e2ngulo de enrolamento<\/li><li data-section-id=\"1ypn48f\" data-start=\"7941\" data-end=\"7965\">Sistema de carga de tens\u00e3o<\/li><\/ul><p data-start=\"7967\" data-end=\"8108\">Muitos laborat\u00f3rios utilizam uma plataforma universal de ensaios de tra\u00e7\u00e3o equipada com dispositivos de fric\u00e7\u00e3o personalizados para efetuar medi\u00e7\u00f5es de fric\u00e7\u00e3o de rolos\/folhas.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-25c167f e-con-full e-flex e-con e-child\" data-id=\"25c167f\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-35feb3f elementor-widget elementor-widget-heading\" data-id=\"35feb3f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Solu\u00e7\u00e3o Cell Instruments<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d0c8677 elementor-widget elementor-widget-text-editor\" data-id=\"d0c8677\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"8141\" data-end=\"8284\">O <strong data-start=\"8145\" data-end=\"8170\">TST-01 Testador de tra\u00e7\u00e3o<\/strong> pode servir como plataforma central para os testes ASTM G143 quando combinada com um dispositivo de fric\u00e7\u00e3o de rolo\/teia personalizado.<\/p><p data-start=\"8286\" data-end=\"8309\">As principais vantagens incluem:<\/p><ul data-start=\"8311\" data-end=\"8628\"><li data-section-id=\"k3au6w\" data-start=\"8311\" data-end=\"8361\">Funcionamento controlado por PLC com ecr\u00e3 t\u00e1til de 7 polegadas<\/li><li data-section-id=\"1o8juqv\" data-start=\"8362\" data-end=\"8402\">Sistema de acionamento por fuso de esferas de alta precis\u00e3o<\/li><li data-section-id=\"11r2jjw\" data-start=\"8403\" data-end=\"8439\">Velocidade ajust\u00e1vel de 1-500 mm\/min<\/li><li data-section-id=\"12uftm5\" data-start=\"8440\" data-end=\"8469\">Capacidades de for\u00e7a at\u00e9 1 kN<\/li><li data-section-id=\"9x1ctf\" data-start=\"8470\" data-end=\"8505\">Medi\u00e7\u00e3o exacta da desloca\u00e7\u00e3o<\/li><li data-section-id=\"heoxsq\" data-start=\"8506\" data-end=\"8537\">Visualiza\u00e7\u00e3o da curva de for\u00e7a em tempo real<\/li><li data-section-id=\"ofk9hg\" data-start=\"8538\" data-end=\"8566\">Integra\u00e7\u00e3o de dispositivos personalizados<\/li><li data-section-id=\"cs3dmn\" data-start=\"8567\" data-end=\"8628\">Configura\u00e7\u00e3o flex\u00edvel para requisitos de teste especializados<\/li><\/ul><p data-start=\"8630\" data-end=\"8807\">Para os laborat\u00f3rios que avaliam v\u00e1rios materiais e condi\u00e7\u00f5es de fric\u00e7\u00e3o, os dispositivos personalizados e as solu\u00e7\u00f5es para v\u00e1rias esta\u00e7\u00f5es podem melhorar ainda mais a efici\u00eancia e a repetibilidade dos testes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-16cdbb1 e-flex e-con-boxed e-con e-parent\" data-id=\"16cdbb1\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-911e548 elementor-widget elementor-widget-text-editor\" data-id=\"911e548\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"9941\" data-end=\"10593\">Compreender as carater\u00edsticas de fric\u00e7\u00e3o do rolo\/folha \u00e9 essencial para garantir um manuseamento est\u00e1vel da folha, um fabrico eficiente e uma qualidade consistente do produto. <a href=\"https:\/\/store.astm.org\/g0143-03r18.html\" target=\"_blank\" rel=\"noopener nofollow\">ASTM G143<\/a> fornece dados valiosos para a avalia\u00e7\u00e3o de materiais, superf\u00edcies de rolos, revestimentos e condi\u00e7\u00f5es de processamento. A Cell Instruments oferece plataformas de teste de tra\u00e7\u00e3o, dispositivos de fric\u00e7\u00e3o personalizados e solu\u00e7\u00f5es de teste espec\u00edficas para aplica\u00e7\u00f5es, projetadas para suportar a ASTM G143 e outros requisitos de teste de coeficiente de fric\u00e7\u00e3o. Quer esteja a desenvolver novos materiais ou a melhorar o desempenho da produ\u00e7\u00e3o, a sele\u00e7\u00e3o do sistema de teste adequado pode ajudar a gerar dados de fric\u00e7\u00e3o fi\u00e1veis e acion\u00e1veis.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>ASTM G143 Standard Test Method for Measurement of Web\/Roller Friction Characteristics ASTM G143 is a standardized test method used to evaluate the friction behavior between a flexible web material and a cylindrical roller surface. The method measures both the static and kinetic coefficient of friction (COF) during sliding contact and helps manufacturers understand how web [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-803","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/pages\/803","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/comments?post=803"}],"version-history":[{"count":4,"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/pages\/803\/revisions"}],"predecessor-version":[{"id":808,"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/pages\/803\/revisions\/808"}],"wp:attachment":[{"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/media?parent=803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}