<p data-start=”59″ data-end=”73″>Hi everyone,<\/p><p data-start=”75″ data-end=”250″>I am currently studying the crushing performance of a Miura origami cylinder and encountering an issue with maintaining consistent material orientation across a single face.<\/p><p data-start=”252″ data-end=”387″>I am using the <em data-start=”267″ data-end=”288″>element orientation<\/em> feature in LS-DYNA (Workbench), specifically the <strong data-start=”338″ data-end=”364″>surface and edge guide<\/strong> option. In my setup:<\/p><ul data-start=”388″ data-end=”527″><li data-section-id=”12ku7zo” data-start=”388″ data-end=”462″>The shell surface is scoped to define the <strong data-start=”432″ data-end=”442″>z-axis<\/strong> (surface normal).<\/li>\n
<li data-section-id=”14jxcz3″ data-start=”463″ data-end=”527″>A circumferential edge is selected to define the <strong data-start=”514″ data-end=”524″>x-axis<\/strong>.<\/li>\n<\/ul>\n
<p data-start=”529″ data-end=”601″>However, after generating the orientation, I observe an inconsistency:<\/p><ul data-start=”602″ data-end=”786″><li data-section-id=”1k6nyj8″ data-start=”602″ data-end=”678″>For some elements, the <strong data-start=”627″ data-end=”637″>x-axis<\/strong> aligns correctly with the guided edge.<\/li>\n
<li data-section-id=”13t8oyw” data-start=”679″ data-end=”786″>For others, the orientation appears rotated by 90°, such that the <strong data-start=”747″ data-end=”757″>y-axis<\/strong> aligns with the same edge.<\/li>\n<\/ul>\n
<p data-start=”788″ data-end=”964″>This mismatch follows a diagonal pattern across the face (as shown in the figure) and occurs consistently on all faces, regardless of their orientation in the Miura geometry.<\/p><p data-start=”966″ data-end=”1003″>I would appreciate any guidance on:<\/p><ul data-start=”1004″ data-end=”1145″><li data-section-id=”x0yox8″ data-start=”1004″ data-end=”1058″>Why this alternating orientation is occurring, and<\/li>\n
<li data-section-id=”13jfi5e” data-start=”1059″ data-end=”1145″>How to enforce a consistent local coordinate system across all elements on a face.<\/li>\n<\/ul>\n
<p data-start=”1147″ data-end=”1184″>Thank you in advance for your help.<\/p><p> <\/p><p> <\/p><\/p><\/p>\n","protected":false},"template":"","class_list":["post-456898","topic","type-topic","status-publish","hentry","topic-tag-ansys-workbench-ls-dyna","topic-tag-element-coordinate-system-1","topic-tag-orientation-direction"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27825"],"_bbp_topic_id":["456898"],"_bbp_subscription":["675237","170445"],"_bbp_author_ip":["130.233.138.200"],"_bbp_last_reply_id":["456997"],"_bbp_last_active_id":["456997"],"_bbp_last_active_time":["2026-04-23 17:39:42"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["675237","170445"],"_btv_view_count":["33"],"_bbp_topic_status":["unanswered"],"_edit_last":["675237"]},"test":"akshay-kalgutkaraalto-fi"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/456898","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\/456898\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=456898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}