{"id":303532,"date":"2023-08-27T19:23:07","date_gmt":"2023-08-27T19:23:07","guid":{"rendered":"\/forum\/forums\/topic\/cannot-converge-for-2-materials-fiber-composites-for-large-displacement\/"},"modified":"2023-08-27T19:23:07","modified_gmt":"2023-08-27T19:23:07","slug":"cannot-converge-for-2-materials-fiber-composites-for-large-displacement","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cannot-converge-for-2-materials-fiber-composites-for-large-displacement\/","title":{"rendered":"cannot converge for 2 materials fiber composites for large displacement"},"content":{"rendered":"<p>I&#8217;m trying to do a 2 materials fiber composites for large displacement. The version is APDL 2021 R1.<\/p>\n<p>Here is the link for elements and nodes.<\/p>\n<p>https:\/\/drive.google.com\/drive\/folders\/1vGF3F-EF8pqMliSi8pbBQfw_230DUfUS?usp=sharing<\/p>\n<p>It can converge with displacement 10 or 20 or 30, but can&#8217;t converge for large displacement like 150 or 200. Can you help me to check why this happens?<\/p>\n<p>&nbsp;<\/p>\n<p>Here are the APDL code. it can run with nodes and elements<\/p>\n<p>FINISH<br \/>\/CLEAR<\/p>\n<p>*do,fid,3,3<\/p>\n<p>\/PREP7 &nbsp;<\/p>\n<p>!*=========================<br \/>!* unit sets: (N, mm, MPa) or (uN, um, MPa)<br \/>!* we use (uN, um, MPa)<\/p>\n<p>!*==== Define material 1<br \/>ET,1,SOLID285<br \/>MP,EX,1,1000 &nbsp; &nbsp;!* Young&#8217;s modulus, unit: MPa<br \/>MP,NUXY,1,0.3<\/p>\n<p>!*==== Define material 2<br \/>ET,2,SOLID285 &nbsp;&nbsp;<br \/>!!TB,HYPE,2,1,5,MOON &nbsp;<br \/>!!TBTEMP,0<br \/>!!TBDATA,,-1.4516,1.8669,1.5083,-4.3864,3.8062,0<\/p>\n<p>TB,HYPER,2,,3,OGDEN &nbsp; &nbsp;!3 parameter Ogden model<br \/>TBDATA,1,-9.19 &nbsp; &nbsp; &nbsp;!Define mu1 (MPa)<br \/>TBDATA,2,2.74 &nbsp; &nbsp; &nbsp; !Define a1<br \/>TBDATA,3,-8.61 &nbsp; &nbsp; &nbsp;!Define mu2 (MPa)<br \/>TBDATA,4,-5.55 &nbsp; &nbsp; &nbsp;!Define a2<br \/>TBDATA,5,6.92 &nbsp; &nbsp; &nbsp; !Define mu3 (MPa)<br \/>TBDATA,6,1.31 &nbsp; &nbsp; &nbsp; !Define a3<br \/>TBDATA,7,1E-5 &nbsp; &nbsp; &nbsp; !Define d1=2\/K, K is the bulk modulus<\/p>\n<p>&nbsp;<\/p>\n<p>\/PREP7 &nbsp;<\/p>\n<p>SHPP, OFF<\/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>NLMESH,SRAT,2<\/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 \/>(4F15.0) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; !* read in 4 Float numbers using width=15<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;!* width=15 should be &gt;= the actual widith of the numbers<\/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 \/>(5F10.0)<\/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,2),etb(i,3),etb(i,4),etb(i,5) !*4 node numbers<br \/>*enddo<\/p>\n<p>!*=== next block: read in model info, number of nodes, elements etc<br \/>filename=strcat(&#8216;model_info&#8217;,chrval(fid))<br \/>\/INQUIRE,rows3,LINES,%filename%,%fext%<br \/>*DIM,infotb,ARRAY,rows3,1<br \/>*VREAD,infotb,%filename%,%fext%,,JIK,1,rows3<br \/>(F10.0)<\/p>\n<p>!*=== get number of nodes, elements etc<br \/>n_polymer=infotb(3,1)<br \/>n_elements=infotb(2,1)<br \/>n_fiber=n_elements &#8211; n_polymer<\/p>\n<p>!*=== next two blocks assign materials to fiber and polymer groups<br \/>ESEL,S,ELEM,,1,n_fiber<br \/>MPCHG,1,ALL<br \/>CM,FILLER,ELEM<\/p>\n<p>ESEL,S,elem,,n_fiber+1,n_elements<br \/>MPCHG,2,ALL<br \/>CM,MATRIX,ELEM<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\/SOL<\/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,Z,0<br \/>D,ALL,UZ,0<\/p>\n<p>*do,i,1,3 &nbsp; &nbsp; !* loop over three displacements<\/p>\n<p>\/SOL<br \/>u=50*i<\/p>\n<p>NSEL,S,LOC,X,100<br \/>D,ALL,UX,u<\/p>\n<p>&nbsp;<\/p>\n<p>ANTYPE,0<br \/>NLGEOM,ON<br \/>AUTOTS,ON &nbsp;&nbsp;<br \/>NSUBST,100,5000,20<br \/>NLMESH,SRAT,2<\/p>\n<p>&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<\/p>\n<p>tempname=strcat(chrval(fid),&#8217;_&#8217;)<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 \/>*GET,strx,node,xid,s,X<br \/>*vwrite,strx<br \/>(G16.8)<br \/>*enddo<br \/>*cfclose<\/p>\n<p>tempname=strcat(chrval(fid),&#8217;_&#8217;)<br \/>tempname=strcat(tempname,chrval(i))<br \/>filename=strcat(&#8216;nodal_stress_y&#8217;,tempname)<br \/>*cfopen,%filename%,txt,,<br \/>*do,xid,1,rows1<br \/>*GET,strx,node,xid,s,Y<br \/>*vwrite,strx<br \/>(G16.8)<br \/>*enddo<br \/>*cfclose<\/p>\n<p>tempname=strcat(chrval(fid),&#8217;_&#8217;)<br \/>tempname=strcat(tempname,chrval(i))<br \/>filename=strcat(&#8216;nodal_stress_xy&#8217;,tempname)<br \/>*cfopen,%filename%,txt,,<br \/>*do,xid,1,rows1<br \/>*GET,strx,node,xid,s,XY<br \/>*vwrite,strx<br \/>(G16.8)<br \/>*enddo<br \/>*cfclose<\/p>\n<p>&nbsp;<\/p>\n<p>FINISH&nbsp;<br \/>*enddo<br \/>\/CLEAR<\/p>\n<p>*enddo &nbsp; &nbsp;!* end of outer loop<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-303532","topic","type-topic","status-closed","hentry","topic-tag-convergence","topic-tag-material-nonlinearity-1"],"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 do a 2 materials fiber composites for large displacement. 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The version is APDL 2021 R1.Here is the link for elements and nodes.https:\/\/drive.google.com\/drive\/folders\/1vGF3F-EF8pqMliSi8pbBQfw_230DUfUS?usp=sharingIt can converge with displacement 10 or 20 or 30, but can't converge for large displacement like 150 or 200. Can you help me to check why this happens? Here are the","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cannot-converge-for-2-materials-fiber-composites-for-large-displacement\/#breadcrumblist"},"datePublished":"2023-08-27T19:23:07+00:00","dateModified":"2023-08-27T19:23:07+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 for 2 materials fiber composites for large displacement | Ansys Learning Forum","og:description":"I'm trying to do a 2 materials fiber composites for large displacement. The version is APDL 2021 R1.Here is the link for elements and nodes.https:\/\/drive.google.com\/drive\/folders\/1vGF3F-EF8pqMliSi8pbBQfw_230DUfUS?usp=sharingIt can converge with displacement 10 or 20 or 30, but can't converge for large displacement like 150 or 200. Can you help me to check why this happens? Here are the","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cannot-converge-for-2-materials-fiber-composites-for-large-displacement\/","article:published_time":"2023-08-27T19:23:07+00:00","article:modified_time":"2023-08-27T19:23:07+00:00","twitter:card":"summary_large_image","twitter:title":"cannot converge for 2 materials fiber composites for large displacement | Ansys Learning Forum","twitter:description":"I'm trying to do a 2 materials fiber composites for large displacement. The version is APDL 2021 R1.Here is the link for elements and nodes.https:\/\/drive.google.com\/drive\/folders\/1vGF3F-EF8pqMliSi8pbBQfw_230DUfUS?usp=sharingIt can converge with displacement 10 or 20 or 30, but can't converge for large displacement like 150 or 200. Can you help me to check why this happens? Here are the"},"aioseo_meta_data":{"post_id":"303532","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 17:48:25","updated":"2024-10-28 17:48:25","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 for 2 materials fiber composites for large displacement\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 for 2 materials fiber composites for large displacement","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cannot-converge-for-2-materials-fiber-composites-for-large-displacement\/"}],"acf":[],"custom_fields":[{"0":{"_oembed_9c2c42801ae1ccaec10230afb8a0148b":["{{unknown}}"],"_bbp_subscription":["18309","88","50680","293206"],"_bbp_author_ip":["23.206.193.41"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["515"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_oembed_84c39914ffb26ebb9a2d8410a834c6a1":["{{unknown}}"],"_bbp_topic_id":["303532"],"_bbp_forum_id":["27815"],"_bbp_engagement":["88","18309","50680"],"_bbp_voice_count":["3"],"_bbp_reply_count":["5"],"_bbp_reply_count_hidden":["1"],"_bbp_last_reply_id":["305716"],"_bbp_last_active_id":["305716"],"_bbp_last_active_time":["2023-09-10 02:43:12"]},"test":"yunpengclemson-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/303532","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\/303532\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=303532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}