{"id":387780,"date":"2024-10-02T08:47:38","date_gmt":"2024-10-02T08:47:38","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-transverse-shear-stiffness-matrix-of-shell-281-element\/"},"modified":"2024-10-02T08:47:38","modified_gmt":"2024-10-02T08:47:38","slug":"the-transverse-shear-stiffness-matrix-of-shell-281-element","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-transverse-shear-stiffness-matrix-of-shell-281-element\/","title":{"rendered":"The transverse shear stiffness matrix of Shell 281 element"},"content":{"rendered":"<p>&lt;p&gt;Hi, guys&lt;\/p&gt;&lt;p&gt;I have a question about the Shell281 element. I&#8217;m using the ANSYS APDL for modal anaysis. I calculated the ABD matrix of my mateiral and aplied it to the shell 281 elements in my FEA model by using the command of SSPA, SSPB and SSPD. My model is thin, so I think the transverse shear stiffness can be negligible and so I didn&#8217;t set the transverse shear stiffness by using the command of SSPE. But Ansys show me that the transverse shear stiffness should be applied. Is there any way to neglect the transverse shear stiffness effect?(like Kirchhoff-love theory)&lt;\/p&gt;&lt;p&gt;&nbsp;I know the shell281 element use First order Shear Deformation Theory(FSDT) as a governing equation. can I change the governing equation to kirchhoff-love theory?&lt;\/p&gt;&lt;p&gt;I know that the shell281 elemnt has an option for the stiffness control(ex: membrane only, membrane and bending stiffness).&lt;\/p&gt;&lt;p&gt;I want to use membrane and bending stiffness option.&nbsp;&lt;\/p&gt;&lt;p&gt;Thank you.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-387780","topic","type-topic","status-publish","hentry","topic-tag-ansysstructuresolveIssue-1","topic-tag-Modal_Analysis-1","topic-tag-shell281-2"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi, guysI have a question about the Shell281 element. I&#039;m using the ANSYS APDL for modal anaysis. I calculated the ABD matrix of my mateiral and aplied it to the shell 281 elements in my FEA model by using the command of SSPA, SSPB and SSPD. My model is thin, so I think the transverse\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-transverse-shear-stiffness-matrix-of-shell-281-element\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"The transverse shear stiffness matrix of Shell 281 element | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi, guysI have a question about the Shell281 element. I&#039;m using the ANSYS APDL for modal anaysis. I calculated the ABD matrix of my mateiral and aplied it to the shell 281 elements in my FEA model by using the command of SSPA, SSPB and SSPD. My model is thin, so I think the transverse\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-transverse-shear-stiffness-matrix-of-shell-281-element\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-10-02T08:47:38+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-10-02T08:47:38+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"The transverse shear stiffness matrix of Shell 281 element | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi, guysI have a question about the Shell281 element. I&#039;m using the ANSYS APDL for modal anaysis. I calculated the ABD matrix of my mateiral and aplied it to the shell 281 elements in my FEA model by using the command of SSPA, SSPB and SSPD. My model is thin, so I think the transverse\" \/>\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\\\/the-transverse-shear-stiffness-matrix-of-shell-281-element\\\/#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\\\/#Modal_Analysis-1\\\/#listItem\",\"name\":\"#Modal_Analysis\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/#Modal_Analysis-1\\\/#listItem\",\"position\":3,\"name\":\"#Modal_Analysis\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/#Modal_Analysis-1\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/the-transverse-shear-stiffness-matrix-of-shell-281-element\\\/#listItem\",\"name\":\"The transverse shear stiffness matrix of Shell 281 element\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/the-transverse-shear-stiffness-matrix-of-shell-281-element\\\/#listItem\",\"position\":4,\"name\":\"The transverse shear stiffness matrix of Shell 281 element\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/#Modal_Analysis-1\\\/#listItem\",\"name\":\"#Modal_Analysis\"}}]},{\"@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\\\/the-transverse-shear-stiffness-matrix-of-shell-281-element\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/the-transverse-shear-stiffness-matrix-of-shell-281-element\\\/\",\"name\":\"The transverse shear stiffness matrix of Shell 281 element | Ansys Learning Forum\",\"description\":\"Hi, guysI have a question about the Shell281 element. 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My model is thin, so I think the transverse"},"aioseo_meta_data":{"post_id":"387780","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 16:25:13","updated":"2026-09-17 04:57:17","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/#Modal_Analysis-1\/\" title=\"#Modal_Analysis\">#Modal_Analysis<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tThe transverse shear stiffness matrix of Shell 281 element\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"#Modal_Analysis","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/#Modal_Analysis-1\/"},{"label":"The transverse shear stiffness matrix of Shell 281 element","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-transverse-shear-stiffness-matrix-of-shell-281-element\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["281359","58821"],"_bbp_author_ip":["220.67.133.49"],"_btv_view_count":["797"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["387780"],"_bbp_forum_id":["27791"],"_bbp_engagement":["58821","281359"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["387785"],"_bbp_last_active_id":["387785"],"_bbp_last_active_time":["2024-10-02 09:17:59"]},"test":"forvery5knaver-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/387780","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\/387780\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=387780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}