{"id":292019,"date":"2023-07-07T10:02:58","date_gmt":"2023-07-07T10:02:58","guid":{"rendered":"\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/"},"modified":"2023-07-07T10:02:58","modified_gmt":"2023-07-07T10:02:58","slug":"deformation-in-wrong-direction-with-gravity","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/","title":{"rendered":"Deformation in wrong direction with gravity"},"content":{"rendered":"<p>Hi,<\/p>\n<p>I&#8217;m trying to model a wing for a static structural analysis, and I&#8217;m getting results that don&#8217;t make sense, as the wing is deflecting downwards, even though the lift force applied is greater than the weight of the wing and the engines. This only happens when applying gravity, as the weight of the engines is imported as external force data, as is the lift distribution, and both are applied using y coordinates along the wing. What could cause the downward deflection of the wing when gravity is applied? Please ignore the strange mesh here, that&#8217;s a sepearate issue. <img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688724024-Deformation.png\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-292019","topic","type-topic","status-closed","hentry","topic-tag-deformation","topic-tag-earth-gravity-1","topic-tag-imported-load"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi,I&#039;m trying to model a wing for a static structural analysis, and I&#039;m getting results that don&#039;t make sense, as the wing is deflecting downwards, even though the lift force applied is greater than the weight of the wing and the engines. This only happens when applying gravity, as the weight of the engines is\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/\" \/>\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=\"Deformation in wrong direction with gravity | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi,I&#039;m trying to model a wing for a static structural analysis, and I&#039;m getting results that don&#039;t make sense, as the wing is deflecting downwards, even though the lift force applied is greater than the weight of the wing and the engines. This only happens when applying gravity, as the weight of the engines is\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688724024-Deformation.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688724024-Deformation.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-07-07T10:02:58+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-07-07T10:02:58+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Deformation in wrong direction with gravity | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi,I&#039;m trying to model a wing for a static structural analysis, and I&#039;m getting results that don&#039;t make sense, as the wing is deflecting downwards, even though the lift force applied is greater than the weight of the wing and the engines. This only happens when applying gravity, as the weight of the engines is\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688724024-Deformation.png\" \/>\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\\\/deformation-in-wrong-direction-with-gravity\\\/#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\\\/deformation\\\/#listItem\",\"name\":\"deformation\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/deformation\\\/#listItem\",\"position\":3,\"name\":\"deformation\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/deformation\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/deformation-in-wrong-direction-with-gravity\\\/#listItem\",\"name\":\"Deformation in wrong direction with gravity\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/deformation-in-wrong-direction-with-gravity\\\/#listItem\",\"position\":4,\"name\":\"Deformation in wrong direction with gravity\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/deformation\\\/#listItem\",\"name\":\"deformation\"}}]},{\"@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\\\/deformation-in-wrong-direction-with-gravity\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/deformation-in-wrong-direction-with-gravity\\\/\",\"name\":\"Deformation in wrong direction with gravity | Ansys Learning Forum\",\"description\":\"Hi,I'm trying to model a wing for a static structural analysis, and I'm getting results that don't make sense, as the wing is deflecting downwards, even though the lift force applied is greater than the weight of the wing and the engines. 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This only happens when applying gravity, as the weight of the engines is","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/#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\/deformation\/#listItem","name":"deformation"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/deformation\/#listItem","position":3,"name":"deformation","item":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/deformation\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/#listItem","name":"Deformation in wrong direction with gravity"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/#listItem","position":4,"name":"Deformation in wrong direction with gravity","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/deformation\/#listItem","name":"deformation"}}]},{"@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\/deformation-in-wrong-direction-with-gravity\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deformation-in-wrong-direction-with-gravity\/","name":"Deformation in wrong direction with gravity | Ansys Learning Forum","description":"Hi,I'm trying to model a wing for a static structural analysis, and I'm getting results that don't make sense, as the wing is deflecting downwards, even though the lift force applied is greater than the weight of the wing and the engines. 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