{"id":236200,"date":"2022-09-23T21:21:28","date_gmt":"2022-09-23T21:21:28","guid":{"rendered":"\/forum\/forums\/reply\/236200\/"},"modified":"2022-09-23T21:21:28","modified_gmt":"2022-09-23T21:21:28","slug":"236200","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/","title":{"rendered":"Reply To: Changing reference temperature of a nonlinear material"},"content":{"rendered":"<p>&lt;p&gt;Hello Helen,&lt;\/p&gt;&lt;p&gt;The MPCHG does allow the switch between nonlinear materials.&nbsp; The help on MPCHG states &#8220;Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.&#8221;&lt;\/p&gt;&lt;p&gt;So we can not switch from say one plasticity model to another, but if all that is changing between them is say reft, or alpha, etc. then my tests show it works.&nbsp;&nbsp;&lt;\/p&gt;&lt;p&gt;You use the esel or cmsel command to select the elements, then the mpchg to change to the alternate material.&lt;\/p&gt;&lt;p&gt;Here I have a cube with a uniform thermal condition, but just the top layer of elements has a material with a different reft (defined vy the mp,reft command) At time = 2, I use a command object of mpchg,1,all, which changes the material of the top layer from material 2 to 1, which is now the same as the rest of the block and the thermal strain adjusts as expected. &nbsp;The model has plasticity and I see the plastic strains develop and persist so for my limited testing it is working as expected.&lt;\/p&gt;&lt;p&gt;While my simple test of showing MAPDL is accepting the change, you will need to double-check on your end that you see the expected results.&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/23-09-2022-1663967745-mceclip0.png\" width=\"813\" height=\"524\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;I hope this helps!&lt;\/p&gt;&lt;p&gt;Regards,&lt;br&gt;Sean&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-236200","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello Helen,The MPCHG does allow the switch between nonlinear materials. The help on MPCHG states &quot;Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.&quot;So we can not switch from say one plasticity model to another,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/\" \/>\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=\"Reply To: Changing reference temperature of a nonlinear material | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hello Helen,The MPCHG does allow the switch between nonlinear materials. The help on MPCHG states &quot;Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.&quot;So we can not switch from say one plasticity model to another,\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/23-09-2022-1663967745-mceclip0.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/23-09-2022-1663967745-mceclip0.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2022-09-23T21:21:28+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2022-09-23T21:21:28+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Changing reference temperature of a nonlinear material | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hello Helen,The MPCHG does allow the switch between nonlinear materials. The help on MPCHG states &quot;Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.&quot;So we can not switch from say one plasticity model to another,\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/23-09-2022-1663967745-mceclip0.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\\\/reply\\\/236200\\\/#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\\\/forums\\\/reply\\\/236200\\\/#listItem\",\"name\":\"Reply To: Changing reference temperature of a nonlinear material\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/236200\\\/#listItem\",\"position\":2,\"name\":\"Reply To: Changing reference temperature of a nonlinear material\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}}]},{\"@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\\\/reply\\\/236200\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/236200\\\/\",\"name\":\"Reply To: Changing reference temperature of a nonlinear material | Ansys Learning Forum\",\"description\":\"Hello Helen,The MPCHG does allow the switch between nonlinear materials. The help on MPCHG states \\\"Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.\\\"So we can not switch from say one plasticity model to another,\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/236200\\\/#breadcrumblist\"},\"datePublished\":\"2022-09-23T21:21:28+00:00\",\"dateModified\":\"2022-09-23T21:21:28+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Reply To: Changing reference temperature of a nonlinear material | Ansys Learning Forum","description":"Hello Helen,The MPCHG does allow the switch between nonlinear materials. The help on MPCHG states \"Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.\"So we can not switch from say one plasticity model to another,","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/#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\/forums\/reply\/236200\/#listItem","name":"Reply To: Changing reference temperature of a nonlinear material"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/#listItem","position":2,"name":"Reply To: Changing reference temperature of a nonlinear material","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}}]},{"@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\/reply\/236200\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/","name":"Reply To: Changing reference temperature of a nonlinear material | Ansys Learning Forum","description":"Hello Helen,The MPCHG does allow the switch between nonlinear materials. The help on MPCHG states \"Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.\"So we can not switch from say one plasticity model to another,","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/#breadcrumblist"},"datePublished":"2022-09-23T21:21:28+00:00","dateModified":"2022-09-23T21:21:28+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Reply To: Changing reference temperature of a nonlinear material | Ansys Learning Forum","og:description":"Hello Helen,The MPCHG does allow the switch between nonlinear materials. The help on MPCHG states &quot;Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.&quot;So we can not switch from say one plasticity model to another,","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/23-09-2022-1663967745-mceclip0.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/23-09-2022-1663967745-mceclip0.png","article:published_time":"2022-09-23T21:21:28+00:00","article:modified_time":"2022-09-23T21:21:28+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: Changing reference temperature of a nonlinear material | Ansys Learning Forum","twitter:description":"Hello Helen,The MPCHG does allow the switch between nonlinear materials. The help on MPCHG states &quot;Changes the material number of the specified element. Between load steps in SOLUTION, material properties cannot be changed from linear to nonlinear, or from one nonlinear option to another.&quot;So we can not switch from say one plasticity model to another,","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/23-09-2022-1663967745-mceclip0.png"},"aioseo_meta_data":{"post_id":"236200","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 19:02:55","updated":"2026-07-29 02:32:13","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\tReply To: Changing reference temperature of a nonlinear material\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Reply To: Changing reference temperature of a nonlinear material","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/236200\/"}],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/236200","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/236200\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=236200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}