{"id":7589,"date":"2026-03-10T11:47:41","date_gmt":"2026-03-10T03:47:41","guid":{"rendered":"http:\/\/www.camcjsw-testmachines.com\/?p=7589"},"modified":"2026-03-19T11:01:51","modified_gmt":"2026-03-19T03:01:51","slug":"industry-standard-plastics-iso899-1-creep-test","status":"publish","type":"post","link":"http:\/\/www.camcjsw-testmachines.com\/ru\/industry-standard-plastics-iso899-1-creep-test\/","title":{"rendered":"Industry Standard &#8211; Plastics &#8211; ISO899-1 &#8211; Creep Test"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"7589\" class=\"elementor elementor-7589\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9ef1988 e-flex e-con-boxed e-con e-parent\" data-id=\"9ef1988\" 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-e518799 elementor-widget elementor-widget-heading\" data-id=\"e518799\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.22.0 - 26-06-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h4 class=\"elementor-heading-title elementor-size-default\">What is Creep Test?<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b06b44 elementor-widget elementor-widget-text-editor\" data-id=\"7b06b44\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.22.0 - 26-06-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>Creep test is a material mechanical property test that measures the slow plastic deformation phenomenon of metal materials under long-term constant temperature and constant stress. The higher the temperature or stress, the more significant the creep phenomenon. Creep can occur under a single stress (tension, compression, or torsion) or under composite stress. The usual creep test is conducted under uniaxial tensile conditions. In terms of stress rupture test, a differentiation is made between short term tests up to approximately 10,000 hours and long term tests starting at approximately 10,000 hours.<\/p>\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-2cbe8d8 e-flex e-con-boxed e-con e-parent\" data-id=\"2cbe8d8\" 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-769b331 elementor-widget elementor-widget-heading\" data-id=\"769b331\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">How does the environment affect behavior?<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1dcccc2 elementor-widget elementor-widget-text-editor\" data-id=\"1dcccc2\" 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<p>For plastic components with\u00a0constant loads, the material will fail over a long period of time. Creep continues until a point, at which the material experiences catastrophic failure due to creep fracture. Similarly, due to the viscoelastic behavior of plastics, the creep rate depends on temperature, stress level, and chemical environment. Environmental stress cracking (ESC)- chemical environments &#8211; can have a dramatic impact on the long-term behavior of materials, leading to premature failure of components at levels far below expected stress.<\/p>\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-0b6daf7 e-flex e-con-boxed e-con e-parent\" data-id=\"0b6daf7\" 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-f02f257 elementor-widget elementor-widget-heading\" data-id=\"f02f257\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Analysis of Standard<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a60daa4 elementor-widget elementor-widget-text-editor\" data-id=\"a60daa4\" 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<p>Temperature control accuracy \u00b13\u2103\u00a0\u00b12\u2103\u00a0(stricter)<\/p><p><strong><b>Key technical points<\/b><\/strong><\/p><p>The standard defines the calculation formula for the tensile creep modulus (Et): Et = \u03c3\/\u03b5t = (F\u00b7L0)\/(A\u00b7\u0394Lt), where the initial stress \u03c3 needs to be kept constant (fluctuation \u2264 \u00b1 1%). Special attention should be paid during testing:<\/p><p>1.The sample should be pre treated under\u00a0ISO 291 standard environment for at least 90 minutes (moisture balance);<\/p><p>2.Suggest using a loading rate of 1-5 seconds to avoid impact effects;<\/p><p>3.Recommended recording time point: Index interval from 1 minute to 1000 hours;<\/p><p><strong><b>Mechanism of Physical Aging Effects<\/b><\/strong><\/p><p>Appendix A elaborates on the significant impact of polymer physical aging on creep behavior: when the material is rapidly cooled from high temperature (such as near Tg) to the test temperature, the molecular structure gradually rearranges over time, resulting in:<\/p><p>1.The longer the aging time te, the more the creep curve shifts towards a longer time direction<\/p><p>Age status reset phenomenon may occur during temperature rise testing;<\/p><p>2.The alpha relaxation process of amorphous phase in semi crystalline polymers is also affected;<\/p><p><strong><b>Engineering application suggestions<\/b><\/strong><\/p><p>For data collection under\u00a0design purposes, it is recommended to:<\/p><p>1.The stress range should cover at least 3 gradients, and it is recommended to have a yield strength of 50% -90%;<\/p><p>2.Time range: Short term (1h)+Medium term (100h)+Long term (1000h+);<\/p><p>3.Environmental control requires monitoring of RH changes in humidity sensitive materials (such as nylon);<\/p><p>Typical data presentation methods should include: isothermal stress-strain curves (ISO 11403-1) and three-dimensional creep surface plots.<\/p>\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-a2ccce2 e-flex e-con-boxed e-con e-parent\" data-id=\"a2ccce2\" 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-3a2c875 elementor-widget elementor-widget-heading\" data-id=\"3a2c875\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Relevant standards for creep tests on plastics<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-db9fbe5 elementor-widget elementor-widget-text-editor\" data-id=\"db9fbe5\" 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<p>ISO 899-1 Determination of creep behavior &#8211; Part 1: Tensile creep<\/p><p>ISO 899-2 Determination of creep behavior &#8211; Part 2: Flexural creep by three-point loading<\/p><p>ASTM D2990 Standard Test Methods for Tensile, Compressive and Flexural Creep and Creep-Rupture of Plastics<\/p><p>ISO 16770 Plastics\u2013Determination of environmental stress cracking (ESC) of polyethylene \u2013 Full-notch creep test (FNCT)<\/p><p>ISO 3384-1 Rubber, vulcanized or thermoplastic\u2013Determination of stress relaxation in compression<\/p><p>ASTM D1780\u00a0Standard Practice for Conducting Creep Tests of Metal-to-Metal Adhesives<\/p><p>ASTM D2294\u00a0Standard Test Method for Creep Properties of Adhesives in Shear by Tension Loading (Metal-to-Metal)<\/p>\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-35b815c e-flex e-con-boxed e-con e-parent\" data-id=\"35b815c\" 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-5c3566c elementor-widget elementor-widget-heading\" data-id=\"5c3566c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Multi-station plastic creep testing machine(3-6 station)<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce59e72 elementor-widget elementor-widget-image\" data-id=\"ce59e72\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! 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Creep test is a material mechanical property test that measures the slow plastic deformation phenomenon of metal materials under long-term constant temperature and constant stress. The higher the temperature or stress, the more significant the creep phenomenon. Creep can occur under a single stress (tension, compression, or torsion) or under composite [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[41],"tags":[],"class_list":["post-7589","post","type-post","status-publish","format-standard","hentry","category-application"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.5 (Yoast SEO v22.9) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>Industry Standard - Plastics - ISO899-1 - Creep Test - SINOTEST, a brand of JIANGSU WALLONG-HSIN MACHINERY ENGINEERING CORPORATION LTD<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"http:\/\/www.camcjsw-testmachines.com\/ru\/industry-standard-plastics-iso899-1-creep-test\/\" \/>\r\n<meta property=\"og:locale\" content=\"ru_RU\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Industry Standard - Plastics - ISO899-1 - Creep Test\" \/>\r\n<meta property=\"og:description\" content=\"What is Creep Test? 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