{"id":4259,"date":"2019-08-02T10:09:06","date_gmt":"2019-08-02T13:09:06","guid":{"rendered":"https:\/\/www.nachodelatorre.com.ar\/mosconi\/?p=4259"},"modified":"2019-08-02T10:09:06","modified_gmt":"2019-08-02T13:09:06","slug":"espuma-metalica-detiene-proyectiles-del-12-7mm-con-menos-de-la-mitad-del-peso-del-acero","status":"publish","type":"post","link":"https:\/\/www.fie.undef.edu.ar\/ceptm\/?p=4259","title":{"rendered":"Espuma met\u00e1lica detiene proyectiles del 12.7mm, con menos de la mitad del peso del acero"},"content":{"rendered":"<p>Investigadores de la Universidad Estatal de Carolina del Norte han ensayado un blindaje para veh\u00edculos que utiliza una espuma met\u00e1lica compuesta (CMF) que ha sido capaz de detener munici\u00f3n perforante calibre 12,7mm, a pesar de pesar menos de la mitad que un blindaje de acero convencional. <!--more--><\/p>\n<div class=\"post-hero__featured-video-container\"><iframe loading=\"lazy\" class=\"lazyloaded\" src=\"https:\/\/www.youtube.com\/embed\/AKx7QV5bukw?feature=oembed\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-rocket-lazyload=\"fitvidscompatible\" data-lazy-src=\"https:\/\/www.youtube.com\/embed\/AKx7QV5bukw?feature=oembed\" data-was-processed=\"true\"><\/iframe><\/div>\n<p>Researchers have demonstrated that vehicle armor using composite metal foam (CMF) can stop ball and armor-piercing .50 caliber rounds as well as conventional steel armor, even though it weighs less than half as much. The finding means that vehicle designers will be able to develop lighter military vehicles without sacrificing safety, or can improve protection without making vehicles heavier.<\/p>\n<p>CMF is a foam that consists of hollow, metallic spheres \u2013 made of materials such as stainless steel or titanium \u2013 embedded in a metallic matrix made of steel, titanium, aluminum or other metallic alloys. In this study, the researchers used steel-steel CMF, meaning that both the spheres and the matrix were made of steel.<\/p>\n<p>For the study, researchers manufactured a hard armor system consisting of a ceramic faceplate, a CMF core and a thin back plate made of aluminum. The armor was tested using .50 caliber ball and armor-piercing rounds. The armor was tested with the rounds being fired at impact velocities from 500 meters per second up to 885 meters per second.<\/p>\n<p>The CMF layer of the armor was able to absorb 72-75% of the kinetic energy of the ball rounds, and 68-78% of the kinetic energy of the armor-piercing rounds.<\/p>\n<p>\u201cThe CMF armor was less than half the weight of the rolled homogeneous steel armor needed to achieve the same level of protection,\u201d says Afsaneh Rabiei, corresponding author of a paper on the work and a professor of mechanical and aerospace engineering at North Carolina State University. Rabiei, the inventor of CMF, has spent years developing and testing CMF materials.<\/p>\n<p>\u201cIn other words, we were able to achieve significant weight savings \u2013 which benefits vehicle performance and fuel efficiency \u2013 without sacrificing protection,\u201d Rabiei says.<\/p>\n<p>\u201cThis work shows that CMF can offer a significant advantage for vehicle armor, but there is still room for improvement,\u201d Rabiei says. \u201cThese findings stem from testing armors we made by simply combining steel-steel CMF with off-the-shelf ceramic face plates, aluminum back plate and adhesive material. We only optimized our CMF material and replaced the steel plate in standard vehicle armor with steel-steel CMF armor. There is additional work we could do to make it even better. For example, we would like to optimize the adhesion and thickness of the ceramic, CMF and aluminum layers, which may lead to even lower total weight and improved efficiency of the final armor.\u201d<\/p>\n<p>In previous work, Rabiei and her collaborators demonstrated that CMF could\u00a0block blast pressure and fragmentation\u00a0at 5,000 feet per second from high explosive incendiary rounds detonating only 18 inches away. Her team also showed that\u00a0CMF could stop a 7.62 x 63 millimeter M2 armor piercing projectile\u00a0at a total thickness of less than an inch, while the indentation on the back was less than 8 millimeters. For context, the National Institute of Justice standard allows up to 44 millimeters indentation in the back of armor.<\/p>\n<p>In addition, Rabiei\u2019s group has shown that CMFs, in addition to being lightweight, are\u00a0very effective at shielding X-rays, gamma rays and neutron radiation\u00a0\u2013 and can\u00a0handle fire and heat twice as well\u00a0as the plain metals they are made of.<\/p>\n<p>\u201cIn short, CMFs hold promise for a variety of applications: from space exploration to shipping nuclear waste, explosives and hazardous materials, to military and security applications and even cars, buses and trains,\u201d Rabiei says.<\/p>\n<p>The new paper, \u201cBallistic Performance of Composite Metal Foam against Large Caliber Threats,\u201d is published in the journal\u00a0<em>Composite Structures<\/em>. First author of the paper is Jacob Marx, a Ph.D. student at NC\u00a0State. The paper was co-authored by Marc Portanova of the Aviation Development Directorate in the U.S. Army Combat Capabilities Development Command.<\/p>\n<p><strong>Fuente:\u00a0<\/strong><em><a href=\"https:\/\/news.ncsu.edu\/2019\/06\/metal-foam-stops-50-caliber\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/news.ncsu.edu<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Investigadores de la Universidad Estatal de Carolina del Norte han ensayado un blindaje para veh\u00edculos que utiliza una espuma met\u00e1lica compuesta (CMF) que ha sido&hellip; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[18,29,24],"tags":[],"_links":{"self":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/4259"}],"collection":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4259"}],"version-history":[{"count":0,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/4259\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}