{"id":30350,"date":"2018-09-09T21:41:27","date_gmt":"2018-09-09T21:41:27","guid":{"rendered":"\/forum\/forums\/topic\/how-to-approach-the-analysis-of-plywood\/"},"modified":"2018-09-09T21:41:27","modified_gmt":"2018-09-09T21:41:27","slug":"how-to-approach-the-analysis-of-plywood","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-approach-the-analysis-of-plywood\/","title":{"rendered":"How to approach the analysis of Plywood ?"},"content":{"rendered":"<p>Hello!<\/p>\n<p><\/p>\n<p>I am trying to model the structural response of a 6-ply birch plywood panel in pure bending. If the simulation shows good correlation to physical testing, I will move onto stiffness analysis of an aircraft fuselage made of the same panels by using adhesive or other means of fastening. The fuselage is of a SAE Aero regular-class aircraft and the aircraft is student designed.<\/p>\n<p><\/p>\n<p>My questions are:<\/p>\n<p><\/p>\n<p>1. What kind of geometry should I use ? 3D Solid Body, 2D Solid Body or 3D Surface Body?<\/p>\n<p><\/p>\n<p>2. The&nbsp;material&nbsp;<em>Plywood<\/em> is modeled as a homogeneous, isotropic material. In this case, how will Ansys account for the orthotropic behavior of the plywood. I am aware of plywoods which are very close to isotropic behavior so this idealization is valid I guess.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/df75fc70-0a0c-4790-aba8-a94c013bf763\/c6f2bc7d-fa77-48a7-b5af-a956016444fe_plywood-properties.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>3. Is there an completely different alternative to this exercise? ACP for example ?<\/p>\n<p><\/p>\n<p>4. The results of the physical testing are sensitive to loading geometry so I should model the test fixtures and loading tool, right ?<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/df75fc70-0a0c-4790-aba8-a94c013bf763\/42c522c2-012e-4312-aa46-a9560164cf2a_3-point-bend-test.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>We do not have material data for the 6-ply birch plywood and the people we source it from cannot be trusted, in all honesty! That is why we are testing it ourselves so we can obtain the&nbsp;<span style=\"color: #444444; font-family: 'Source Sans Pro', Helvetica, sans-serif; font-size: 15px;\">flexural modulus, stress-strain behavior, and failure limits in bending. We do have some excellent papers on plywood and we will be comparing our results to the values in those papers.<\/span><\/p>\n<p><\/p>\n<p><span style=\"color: #444444; font-family: 'Source Sans Pro', Helvetica, sans-serif; font-size: 15px;\">I hope I did not create a repetitive post here. Please let me know if additional information is needed and if you have any questions.<\/span><\/p>\n<p><\/p>\n<p><span style=\"color: #444444; font-family: 'Source Sans Pro', Helvetica, sans-serif; font-size: 15px;\">Thanks!<\/span><\/p>\n","protected":false},"template":"","class_list":["post-30350","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["2520"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0","0","0","0"],"_btv_view_count":["2876"],"_bbp_subscription":["236976"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["30350"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","65357"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["63940"],"_bbp_last_active_id":["63940"],"_bbp_last_active_time":["2018-09-11 01:57:41"]},"test":"sujaysanjiv"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/30350","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/30350\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=30350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}