{"id":23920,"date":"2024-12-17T09:46:13","date_gmt":"2024-12-17T02:46:13","guid":{"rendered":"https:\/\/aie.com.vn\/?p=23920"},"modified":"2024-12-17T09:56:24","modified_gmt":"2024-12-17T02:56:24","slug":"markforged-vat-lieu-composite-va-ung-dung","status":"publish","type":"post","link":"https:\/\/aie.com.vn\/en\/markforged-vat-lieu-composite-va-ung-dung\/","title":{"rendered":"UNDERSTANDING COMPOSITE MATERIALS"},"content":{"rendered":"

In a\u00a0previous blog post<\/a>, we broke down key differences between the most popular 3D printing thermoplastics. While their low melting temperature and general simplicity of printing make for quick and easy parts, thermoplastics leave something to be desired when it comes to mechanical properties such as strength, stiffness, and heat resistance. Fortunately, utilizing a technology similar to Fused Filament Fabrication (the most popular thermoplastic printing process), Markforged has developed a way to 3D print composites that surpass the properties of thermoplastics in nearly every way.<\/span><\/p>\n

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What are composites?<\/strong><\/span><\/h2>\n

Composites are materials made from two or more substances that, when combined, have properties different from the original components. They are comprised of two main elements: a matrix and a reinforcement. For typical fiber composites, the reinforcement (carbon fiber or fiberglass, for example) is formed into the prefered shape and then covered with a matrix, often an epoxy or a thermoplastic, to retain its structure. Composites are beneficial because of the synergistic traits that arise from the combination of materials, allowing them to far outperform thermoplastics while maintaining low density. In fact, many carbon fiber layups are stronger than steel at one tenth the weight.<\/span><\/p>\n

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In a traditional composite layup, a fiber weave is positioned and is then secured into place by a matrix<\/span><\/p>\n


\nThere are numerous types of matrices and reinforcements that make up many different composite materials; in this post we\u2019ll take a look specifically into Markforged\u2019s 3D printed composites, their properties, and ideal applications.<\/span><\/p>\n

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3D printed composites<\/strong><\/span><\/span><\/p>\n

Just like any other composite parts, Markforged\u2019s 3D printed composites are made up of two components: a matrix and a reinforcement. Our matrix is called Onyx, a nylon-based thermoplastic, and the reinforcement is one of our four continuous fibers. These reinforcement fibers include carbon fiber, fiberglass, high-strength high-temperature fiberglass, and Kevlar\u00ae.
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Composite parts are printed layer by layer, using a process called Continuous Filament Fabrication (CFF). Above is a part sliced in half to show the fiber reinforcement inside.<\/span><\/figcaption>
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Fiberglass<\/strong><\/h2>\n

Fiberglass<\/a>\u00a0is our entry-level reinforcement fiber. As the name suggests, it is composed of glass fibers bound together into a filament. Fiberglass is a good beginner reinforcement fiber because it is high-performing while remaining inexpensive. In flexure, fiberglass is four times stronger and eleven times more rigid than ABS. This offers an effective way to begin 3D printing industrial tools, fixtures, and workholding that require more strength than a thermoplastic would be able to offer.<\/span><\/p>\n

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Carbon fiber<\/strong><\/span><\/h2>\n

Carbon fiber\u00a0<\/a>is the strongest and stiffest of Markforged\u2019s reinforcement fibers. With a strength-to-weight ratio nearly twice that of 6061 aluminum, 3D printed carbon fiber parts can outperform those machined out of metal. Carbon fiber also deflects minimally when stressed, giving it an edge over aluminum which plastically deforms as it is loaded.<\/span><\/p>\n

Because the strength of carbon fiber rivals that of metal, our customers often use it to print parts they would normal machine. This includes\u00a0soft jaws<\/a>, end-use parts, and production forming tools.<\/span><\/p>\n

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Kevlar<\/strong><\/span><\/h2>\n

Kevlar<\/a> is a more specialized reinforcement fiber with unique qualities. It is extremely durable; parts reinforced with Kevlar can take a beating without failing. It\u2019s also the lightest of Markforged\u2019s reinforcement fibers, with a density 15-20% lower than the others. One of the most notable characteristics of Kevlar is its ability to plastically deform without losing strength. Kevlar-reinforced parts allow some give when loaded towards maximum resulting in a more gradual failure mode. For example, carbon fiber, which is stiffer, but much more brittle, fails completely and with no warning when loaded to its maximum. Kevlar, on the other hand, deforms until fibers begin to fail one at a time, providing a much more predictable failure.<\/span><\/p>\n

Due to its low density and superior durability, Kevlar is a great candidate for applications involving a lot of motion and repeated contact with other parts. Our customers use it to 3D print\u00a0end effectors<\/a>, crash test dummies, mechanical stops, and other applications involving variable loads.<\/span><\/p>\n

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High-strength high-temperature fiberglass<\/strong><\/span><\/h2>\n

HSHT fiberglass<\/a>\u00a0is another specialized reinforcement. As the name suggests, it is a heat-resistant, high-strength version of fiberglass. It retains its rigidity at temperatures up to 300 degrees Fahrenheit. HSHT also exhibits incredible impact resistance: 30x that of ABS and over 100x that of PLA. Additionally, HSHT fiberglass is our most elastic fiber; it will deflect as it is loaded, and then will return to its original shape when the load is removed. This is an advantageous property for parts that require repeated deflection without permanent deformation.<\/span><\/p>\n

The above properties lend HSHT to resist plastic deformation during the repeated clamping and thermal shock of certain manufacturing processes. Our customers utilize HSHT to 3D print\u00a0welding fixtures<\/a>, thermoforms,\u00a0thermoset molds<\/a>, injection mold inserts, blow molds, and parts for other high-impact, high-temperature applications.<\/span><\/p>\n

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A stress strain curve showcasing the strength and stiffness properties of Markforged\u2019s\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 reinforcement fibers.<\/span><\/span>\u00a0<\/figcaption><\/figure>\n

Composite 3D printing<\/strong><\/h2>\n

Composite 3D printing gives designers and engineers the ability to leverage a diverse set of material properties for applications throughout the manufacturing cycle. The specialized traits exhibited by the four fibers we covered in this post open up opportunities to apply\u00a0additive manufacturing<\/a> where it never has before.<\/span><\/p>\n

<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

In a\u00a0previous blog post, we broke down key differences between the most popular 3D printing thermoplastics. While their low melting temperature and general simplicity of printing make for quick and easy parts, thermoplastics leave something to be desired when it comes to mechanical properties such as strength, stiffness, and heat resistance. Fortunately, utilizing a technology…<\/p>\n","protected":false},"author":1,"featured_media":23908,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52,168,29],"tags":[],"class_list":["post-23920","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-en","category-blog-en-2","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/posts\/23920","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/comments?post=23920"}],"version-history":[{"count":7,"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/posts\/23920\/revisions"}],"predecessor-version":[{"id":23930,"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/posts\/23920\/revisions\/23930"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/media\/23908"}],"wp:attachment":[{"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/media?parent=23920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/categories?post=23920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aie.com.vn\/en\/wp-json\/wp\/v2\/tags?post=23920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}