{"id":303489,"date":"2023-08-27T00:57:47","date_gmt":"2023-08-27T00:57:47","guid":{"rendered":"\/forum\/forums\/topic\/cannot-converge-during-simple-2-mateirals-non-linear-large-displacement-problem\/"},"modified":"2023-08-27T19:17:27","modified_gmt":"2023-08-27T19:17:27","slug":"cannot-converge-during-simple-2-mateirals-non-linear-large-displacement-problem","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cannot-converge-during-simple-2-mateirals-non-linear-large-displacement-problem\/","title":{"rendered":"Cannot converge during simple 2 mateirals non linear large displacement problem"},"content":{"rendered":"<p>I&#8217;m trying to doing a simple 2 materials non linear large displacement problem, assigned 2 materials, and a 100*100 element 2D square, do a displacement UX=200 on the right hand side of the square.<\/p>\n<p>It can be done, when I assign the same material for all the element, but can&#8217;t converge with 2 materials.&nbsp;<\/p>\n<p>Can you help me to check what happens or give me some tips or advices?<\/p>\n<p>Here is for 1 material.<\/p>\n<p><a class=\"wp-colorbox-image cboxElement\" href=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/27-08-2023-1693097771-mceclip0.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/27-08-2023-1693097771-mceclip0.png\"><\/a><\/p>\n<p>Here is for 2 materials:<\/p>\n<p><a class=\"wp-colorbox-image cboxElement\" href=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/27-08-2023-1693097829-mceclip1.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/27-08-2023-1693097829-mceclip1.png\"><\/a><\/p>\n<p>FINISH<br \/>\/CLEAR<\/p>\n<p>*do,fid,1,1<\/p>\n<p>\/PREP7 &nbsp;<\/p>\n<p>!=== Define material 1<br \/>ET,1,PLANE182 &nbsp;&nbsp;<\/p>\n<p>TB,HYPE,1,1,5,MOON &nbsp;<br \/>TBTEMP,0<br \/>TBDATA,,-1.4516,1.8669,1.5083,-4.3864,3.8062,0<\/p>\n<p>!==== Define material 2<br \/>ET,2,PLANE182<br \/>MP,EX,2,0.6<br \/>MP,NUXY,2,0.3<\/p>\n<p>\/PREP7 &nbsp;<\/p>\n<p>NDELE,ALL<br \/>EDELE,ALL<br \/>DDELE,ALL,ALL&nbsp;<br \/>NUMCMP,ALL<\/p>\n<p>*set,ntb<br \/>*set,etb<\/p>\n<p>filename=strcat(&#8216;nodes&#8217;,chrval(fid))<br \/>fext=&#8217;dat&#8217;<\/p>\n<p>\/INQUIRE,rows1,LINES,%filename%,%fext%<br \/>*DIM,ntb,ARRAY,rows1,4<br \/>*VREAD,ntb,%filename%,%fext%,,JIK,4,rows1<br \/>(4F6.0) &nbsp; &nbsp;!* read 4 real numbers with maximum 6 digits, use 6 if number is 10000<\/p>\n<p>filename=strcat(&#8216;elements&#8217;,chrval(fid))<\/p>\n<p>\/INQUIRE,rows2,LINES,%filename%,%fext%<br \/>*DIM,etb,ARRAY,rows2,5<br \/>*VREAD,etb,%filename%,%fext%,,JIK,5,rows2<br \/>(5F6.0)<\/p>\n<p>*do,i,1,rows1<br \/>&nbsp; &nbsp; n,ntb(i,1),ntb(i,2),ntb(i,3),ntb(i,4)<br \/>*enddo<\/p>\n<p>*do,i,1,rows2<br \/>&nbsp; &nbsp; e,etb(i,1),etb(i,2),etb(i,3),etb(i,4)<br \/>*enddo<\/p>\n<p>!=== Define element group 1<br \/>k=0<br \/>nElements=1<br \/>*do,i,1,rows2<br \/>&nbsp; &nbsp; nElements=nElements+1<br \/>&nbsp; &nbsp; &nbsp; &nbsp;*if,etb(i,5),eq,1,then<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; k=k+1<br \/>&nbsp; &nbsp; &nbsp; &nbsp;*endif<br \/>*enddo<\/p>\n<p>*status,k<br \/>*status,nElements<\/p>\n<p>ESEL,S,elem,,1,k<br \/>MPCHG,1,ALL<br \/>CM,MATRIX,ELEM<\/p>\n<p>ESEL,S,ELEM,,k+1,nElements<br \/>MPCHG,2,ALL<br \/>CM,FILLER,ELEM<\/p>\n<p>&nbsp;<\/p>\n<p>\/SOL<br \/>ANTYPE,0,NEW<br \/>NLGEOM,1<br \/>NSUBST,200,1000,10 &nbsp;<br \/>AUTOTS,-1.0 &nbsp;<\/p>\n<p>ALLSEL,ALL<\/p>\n<p>NSEL,S,LOC,X,0<br \/>D,ALL,UX,0<\/p>\n<p>NSEL,S,LOC,Y,0<br \/>D,ALL,UY,0<\/p>\n<p>NSEL,S,LOC,Y,100<br \/>CP,NEXT,UY,ALL<br \/>ALLSEL,ALL<\/p>\n<p>filename=strcat(&#8216;nlist&#8217;,chrval(fid))<br \/>\/INQUIRE,rows3,LINES,%filename%,%fext%<br \/>*DIM,ctb,ARRAY,rows3,3<br \/>*VREAD,ctb,%filename%,%fext%,,JIK,3,rows3<br \/>(3F6.0)<\/p>\n<p>!=== couple top and bottom nodes for UX<br \/>*do,i,1,rows3<br \/>&nbsp; &nbsp; CP,NEXT,UX,ctb(i,2),ctb(i,3)<br \/>*enddo<\/p>\n<p>*do,i,1,1&nbsp; &nbsp; &nbsp;!* loop over three displacements<\/p>\n<p>\/SOL<br \/>u=200*i<\/p>\n<p>NSEL,S,LOC,X,100<br \/>D,ALL,UX,u<\/p>\n<p>ANTYPE,0<br \/>NLGEOM,1<br \/>!AUTOTS,ON<br \/>!DTIME,0.01,0.00001,0.1<br \/>!ARCLEN,ON<br \/>NSUBST,100,2000,10 &nbsp;<\/p>\n<p>ALLSEL,ALL<br \/>SOLVE &nbsp;&nbsp;<br \/>FINISH &nbsp;<\/p>\n<p>\/POST1 &nbsp;<br \/>PLDISP,1<\/p>\n<p>NSEL,S,LOC,X,0<br \/>set,LAST<br \/>fsum<br \/>*get,fsum,FSUM,0,ITEM,Fx<br \/>force=fsum<\/p>\n<p>filename=strcat(&#8216;res&#8217;,chrval(fid))<\/p>\n<p>*if,i,eq,1,then<br \/>&nbsp; &nbsp; *cfopen,%filename%,txt,,<br \/>*else<br \/>&nbsp; &nbsp; *cfopen,%filename%,txt,,APPEND<br \/>*endif<\/p>\n<p>*vwrite,u,force<br \/>(G16.8,G16.8)<br \/>*cfclose<br \/>tempname=strcat(chrval(fid),&#8217;-&#8216;)<br \/>tempname=strcat(tempname,chrval(i))<br \/>filename=strcat(&#8216;nodal_stress_x&#8217;,tempname)<br \/>*cfopen,%filename%,txt,,<br \/>*do,xid,1,rows1<br \/>*set,strx<br \/>*GET,strx, node,xid,s,X<br \/>*vwrite,strx<br \/>(G16.8)<br \/>*enddo<br \/>*cfclose<\/p>\n<p>filename=strcat(&#8216;nodal_stress_y&#8217;,tempname)<br \/>*cfopen,%filename%,txt,,<br \/>*do,xid,1,rows1<br \/>*set,stry<br \/>*GET,stry, node,xid,s,Y<br \/>*vwrite,stry<br \/>(G16.8)<br \/>*enddo<br \/>*cfclose<\/p>\n<p>filename=strcat(&#8216;nodal_stress_xy&#8217;,tempname)<br \/>*cfopen,%filename%,txt,,<br \/>*do,xid,1,rows1<br \/>*set,strxy<br \/>*GET,strxy, node,xid,s,XY<br \/>*vwrite,strxy<br \/>(G16.8)<br \/>*enddo<br \/>*cfclose<\/p>\n<p>FINISH&nbsp;<br \/>*enddo<br \/>\/CLEAR<\/p>\n<p>*enddo &nbsp; !* end of outer loop<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Here are the link of element and node files, it can load by the APDL code directly. The verison is APDL 2021 R1.<\/p>\n<p>https:\/\/drive.google.com\/drive\/folders\/1jy9AVwywknckaawVl_8z1B_ofg_1Lfk-?usp=sharing<\/p>\n","protected":false},"template":"","class_list":["post-303489","topic","type-topic","status-closed","hentry","topic-tag-2dmaterialsandmetals-1","topic-tag-convergence"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I&#039;m trying to doing a simple 2 materials non linear large displacement problem, assigned 2 materials, and a 100*100 element 2D square, do a displacement UX=200 on the right hand side of the square.It can be done, when I assign the same material for all the element, but can&#039;t converge with 2 materials. 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Can you help","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cannot-converge-during-simple-2-mateirals-non-linear-large-displacement-problem\/#breadcrumblist"},"datePublished":"2023-08-27T00:57:47+00:00","dateModified":"2023-08-27T19:17:27+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":"Cannot converge during simple 2 mateirals non linear large displacement problem | Ansys Learning Forum","og:description":"I'm trying to doing a simple 2 materials non linear large displacement problem, assigned 2 materials, and a 100*100 element 2D square, do a displacement UX=200 on the right hand side of the square.It can be done, when I assign the same material for all the element, but can't converge with 2 materials. Can you help","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cannot-converge-during-simple-2-mateirals-non-linear-large-displacement-problem\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/27-08-2023-1693097771-mceclip0.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/27-08-2023-1693097771-mceclip0.png","article:published_time":"2023-08-27T00:57:47+00:00","article:modified_time":"2023-08-27T19:17:27+00:00","twitter:card":"summary_large_image","twitter:title":"Cannot converge during simple 2 mateirals non linear large displacement problem | Ansys Learning Forum","twitter:description":"I'm trying to doing a simple 2 materials non linear large displacement problem, assigned 2 materials, and a 100*100 element 2D square, do a displacement UX=200 on the right hand side of the square.It can be done, when I assign the same material for all the element, but can't converge with 2 materials. Can you help","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/27-08-2023-1693097771-mceclip0.png"},"aioseo_meta_data":{"post_id":"303489","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 17:48:26","updated":"2024-10-28 17:48:26","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\/convergence\/\" title=\"convergence\">convergence<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tCannot converge during simple 2 mateirals non linear large displacement problem\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":"convergence","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/convergence\/"},{"label":"Cannot converge during simple 2 mateirals non linear large displacement problem","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cannot-converge-during-simple-2-mateirals-non-linear-large-displacement-problem\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["18309"],"_bbp_author_ip":["168.143.243.24"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["273"],"_edit_lock":["1693163814:228961"],"_oembed_656dbfd5494ff92cd09e0b2fd6a3f7a8":["{{unknown}}"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_oembed_b7e8e95d5fa4f68ca72ba8983ce89438":["{{unknown}}"],"_bbp_topic_id":["303489"],"_bbp_forum_id":["27791"],"_bbp_engagement":["18309"],"_bbp_voice_count":["1"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["303530"],"_bbp_last_active_id":["303530"],"_bbp_last_active_time":["2023-08-27 19:15:40"]},"test":"yunpengclemson-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/303489","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\/303489\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=303489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}