{"id":7562,"date":"2025-05-15T15:59:00","date_gmt":"2025-05-15T13:59:00","guid":{"rendered":"https:\/\/ikv-aachen.de\/rp\/long-term-strength-of-direct-screw-connections-in-thermosetting-molding-compounds\/"},"modified":"2025-06-10T11:21:09","modified_gmt":"2025-06-10T09:21:09","slug":"long-term-strength-of-direct-screw-connections-in-thermosetting-molding-compounds","status":"publish","type":"cpt_ikv_rp","link":"https:\/\/ikv-aachen.de\/en\/rp\/long-term-strength-of-direct-screw-connections-in-thermosetting-molding-compounds\/","title":{"rendered":"Long-term strength of direct screw connections in thermosetting moulding compounds"},"content":{"rendered":"<style type=\"text\/css\">\n    #single-header-block_db31db0eb024d71999860c2748222134 .swiperThumbsNavi .swiper-slide {\n        opacity: 0.4;\n    }\n\n    #single-header-block_db31db0eb024d71999860c2748222134 .swiperThumbsNavi .swiper-slide-thumb-active {\n        opacity: 1;\n    }\n<\/style>\n    <section id=\"single-header-block_db31db0eb024d71999860c2748222134\" class=\"block-single-header theGridWrapper \">\n        <div class=\"theGrid12\">\n            <div class=\" col-start-2 col-span-10 md:col-start-3  md:col-span-8\">\n                <h2 class=\"font-serif font-semibold text-blue text-sm w-4\/5\">\n                    Systematic investigation of the connection properties                <\/h2>\n                                    <div class=\"mt-base text-blue text-sm font border-l-8  border-blue pl-base my-12 leading-normal \">\n                        Thermosets are materials that, unlike thermoplastics, cannot be joined by welding. Therefore, bolting, especially direct bolting, is a promising option for realising an economical and detachable connection of thermoset components. At IKV, the joining properties of direct bolting are being systematically investigated in order to be able to create and establish guidelines for the design of direct bolting of thermosets on this basis.                    <\/div>\n                                            <\/div>\n        <\/div>\n    <\/section>\n\n\n\n<p class=\"wp-block-paragraph\">The connection properties of the direct screw connection have already been investigated under short-term load in a previous project. The project &#8220;Practice-relevant investigations into the long-term strength of direct screw connections in injection-moulded thermoset moulding compounds&#8221; (thermoset direct screw connection II), which was launched at the beginning of 2025, builds on these investigations and focuses on the long-term strength of the direct screw connection under dynamic load.<\/p>\n\n\n<figure class=\" relative flex flex-col gap-2xs mb-xs md:mb-l xl:mb-xl\"><img decoding=\"async\"  class=\" max-w-[50vh]  md:max-w-screen-sm  \"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2025\/05\/Langzeitfestigkeit-von-Direktverschraubungen.png\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2025\/05\/Langzeitfestigkeit-von-Direktverschraubungen.png 1038w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2025\/05\/Langzeitfestigkeit-von-Direktverschraubungen-748x553.png 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2025\/05\/Langzeitfestigkeit-von-Direktverschraubungen-768x567.png 768w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" width=\"1038\" height=\"767\" alt=\"Langzeitfestigkeit von Direktverschraubungen\" loading=\"lazy\" \/><span class=\" text-copyright order-3 justify-end text-right w-full  max-w-[50vh]  md:max-w-screen-sm \">&copy; IKV<\/span><figcaption class=\" max-w-[50vh]  md:max-w-screen-sm  text-figcaption justify-end text-right \">Fig. 1: A numerical parameter study of this screw dome geometry is carried out using numerical simulations during the project.<\/figcaption><\/figure>\n\n\n<p class=\"wp-block-paragraph\">The influence of both a static and a dynamic temperature load during the mechanical stressing of the direct screw connection is also to be analyzed. Furthermore, a numerical parameter study of the screw dome geometry is carried out using numerical simulations. The data from the short-term and long-term studies will be compared at the end of the project in order to derive mitigation factors. In this way, based on the short-term strength, conclusions can be drawn about the long-term strength of the direct screwing of thermoset components. Finally, the test results are used to derive general production and application recommendations for the direct screwing of thermosetting moulding compounds.<\/p>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Funding and project data<\/summary>\n<p class=\"wp-block-paragraph\">We would like to thank the BMWK for funding the IGF project (funding code 23254 N) and the project partners for their cooperation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Project duration: 1.5.2024 to 30.04.2026<\/p>\n\n\n<section id=\"logo-bar-block_426c9ff606dffe02271c0e1464746806\" class=\"block-logo-bar py-2xl  clear-both\">\n    <div class=\"theGridWrapper overflow-hidden  \">\n        <div class=\"grid grid-cols-[repeat(auto-fill,minmax(140px,1fr))] gap-base\">\n                            <figure class=\" relative h-full  \"><img decoding=\"async\" fetchpriority=\"low\"  class=\" object-contain w-full h-full mb-base  \"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/10\/BMWE-Logo.png\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/10\/BMWE-Logo.png 500w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/10\/BMWE-Logo-335x335.png 335w\" sizes=\"auto, (max-width: 748px) 100vw, 748px\" width=\"500\" height=\"500\" alt=\"BMWE-Logo\" loading=\"lazy\" \/><\/figure><figure class=\" relative h-full  \"><img decoding=\"async\" fetchpriority=\"low\"  class=\" object-contain w-full h-full mb-base  \"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Logo-IGF.png\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Logo-IGF-748x591.png 748w\" sizes=\"auto, (max-width: 748px) 100vw, 748px\" width=\"748\" height=\"591\" alt=\"Logo-IGF\" loading=\"lazy\" \/><\/figure>                                <\/div>\n    <\/div>\n<\/section>\n<\/details>\n","protected":false},"excerpt":{"rendered":"<p>Thermosets are materials which, unlike thermoplastics, cannot be joined by welding. Therefore, the screw connection, especially the direct screw connection, represents a promising possibility for the realization of an economical and detachable connection of thermoset components. At IKV, the connection properties of direct screw connections are systematically investigated in order to be able to create and establish guidelines for the design of direct screw connections of thermosets on this basis.<\/p>\n","protected":false},"featured_media":7778,"parent":0,"template":"","tags":[1136,1133],"research_fields":[813],"class_list":["post-7562","cpt_ikv_rp","type-cpt_ikv_rp","status-publish","has-post-thumbnail","hentry","tag-screw-connection","tag-thermosets","research_fields-injection-moulding"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Long-term strength of direct screw connections in thermosetting moulding compounds | IKV-Aachen<\/title>\n<meta name=\"description\" content=\"Thermosets are materials which, unlike thermoplastics, cannot be joined by welding. Therefore, the screw connection, especially the direct screw connection, represents a promising possibility for the realization of an economical and detachable connection of thermoset components. At IKV, the connection properties of direct screw connections are systematically investigated in order to be able to create and establish guidelines for the design of direct screw connections of thermosets on this basis.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ikv-aachen.de\/en\/rp\/long-term-strength-of-direct-screw-connections-in-thermosetting-molding-compounds\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Long-term strength of direct screw connections in thermosetting moulding compounds | IKV-Aachen\" \/>\n<meta property=\"og:description\" content=\"Thermosets are materials which, unlike thermoplastics, cannot be joined by welding. Therefore, the screw connection, especially the direct screw connection, represents a promising possibility for the realization of an economical and detachable connection of thermoset components. 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