{"id":163601,"date":"2021-11-01T10:09:33","date_gmt":"2021-11-01T10:09:33","guid":{"rendered":"\/forum\/forums\/topic\/2d-beam-element-stiffness-matrix\/"},"modified":"2021-11-02T07:11:24","modified_gmt":"2021-11-02T07:11:24","slug":"2d-beam-element-stiffness-matrix","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-beam-element-stiffness-matrix\/","title":{"rendered":"2D beam element &#8211; stiffness matrix"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello,<\/p>\n<p><\/p>\n<\/p>\n<p>I would like to model a 2D beam element with 3 DOF in each node (horizontal and vertical displacement and rotation). My model consists of 1 element and 2 nodes.<\/p>\n<p>Ansys seems to model the beam element in 3D with 6 DOF in each node as seen by the 12by12 stiffness matrix as attached (Ansys stiffness matrix).<\/p>\n<div data-embedjson=\"{&quot;url&quot;:&quot;\/forum\/wp-content\/uploads\/forum-uploads\/647\/LVFJIMFVNM4V.png&quot;,&quot;name&quot;:&quot;2d element stiffness matrix.png&quot;,&quot;type&quot;:&quot;image\/png&quot;,&quot;size&quot;:6633,&quot;width&quot;:648,&quot;height&quot;:163,&quot;embedType&quot;:&quot;file&quot;}\">\n<a href=\"\/forum\/wp-content\/uploads\/forum-uploads\/647\/LVFJIMFVNM4V.png\" download aria-label=\"2d element stiffness matrix.png\"><br \/>\n2d element stiffness matrix.png<br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-163601","topic","type-topic","status-closed","hentry","topic-tag-massmatrix2dbeamelement-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello,I would like to model a 2D beam element with 3 DOF in each node (horizontal and vertical displacement and rotation). 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My model consists of 1 element and 2 nodes.Ansys seems to model the beam element in 3D with 6 DOF in each node as seen by the 12by12 stiffness matrix as attached (Ansys stiffness\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-beam-element-stiffness-matrix\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/massmatrix2dbeamelement-1\\\/#listItem\",\"name\":\"mass-matrix-2d-beam-element\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/massmatrix2dbeamelement-1\\\/#listItem\",\"position\":3,\"name\":\"mass-matrix-2d-beam-element\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/massmatrix2dbeamelement-1\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-beam-element-stiffness-matrix\\\/#listItem\",\"name\":\"2D beam element &#8211; stiffness matrix\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-beam-element-stiffness-matrix\\\/#listItem\",\"position\":4,\"name\":\"2D beam element &#8211; stiffness matrix\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/massmatrix2dbeamelement-1\\\/#listItem\",\"name\":\"mass-matrix-2d-beam-element\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-beam-element-stiffness-matrix\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-beam-element-stiffness-matrix\\\/\",\"name\":\"2D beam element \\u2013 stiffness matrix | Ansys Learning Forum\",\"description\":\"Hello,I would like to model a 2D beam element with 3 DOF in each node (horizontal and vertical displacement and rotation). 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