{"id":396870,"date":"2024-12-10T04:58:33","date_gmt":"2024-12-10T04:58:33","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/creep-analysis-in-abaqus\/"},"modified":"2024-12-10T13:55:22","modified_gmt":"2024-12-10T13:55:22","slug":"creep-analysis-in-abaqus","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/creep-analysis-in-abaqus\/","title":{"rendered":"Creep Analysis in Abaqus"},"content":{"rendered":"

<p>I’m performing a creep analysis on a dogbone specimen made of SS-304. I am following this paper Correlation Analysis of Established Creep Failure Models through Computational Modelling for SS-304 Material<\/a>.<br><br>Following is the geometry:<\/p><div class=”bbImageWrapper js-lbImage” title=”Screenshot 2024-12-08 162258.png” data-src=”https:\/\/www.eng-tips.com\/attachments\/screenshot-2024-12-08-162258-png.2078\/” data-lb-sidebar-href=”” data-lb-caption-extra-html=”” data-single-image=”1″>\"\"<\/div><p><br>In property module I’ve created the material, specifying Young’s modulus (201000 MPa) and Poisson’s ratio (0.31) on sheet “Elastic” and specifying Power Law Multiplier (6.18e-17), equation stress order (6.82) and time order (0) in sheet “Creep”.<br><br>Then I create Visco step in Step module, specifying a time period of 6480000 sec (18000 Hr); in the sheet “Incrementation” I’ve chosen the max number of increment (10000), Initial increment size (1), minimum (1e-20) and max (360000), then I’ve chosen creep\/swlling…tolerance (0.1).<br><br>After that I’ve created a coupling constraint in Interaction module, then a reference point for the whole grip section with neck section of the specimen.<br><br><\/p><p>\"\"<\/p><p><br>I’ve created a symmetry BC for the bottom section of grip and neck.<br><br><\/p><p>\"\"<\/p><p><br><br>Then I’ve defined a load (displacement) of 2mm Magnitude. Also a thermal field is also defined of 720°C.<br><br><\/p><p>\"\"<\/p><p><br><br>I’ve done the mesh, I’ve created and started the job, but I am getting wrong stress results but the creep results are somewhat In line. More over the creep curve trend also matched that of the literature, But not for stress results,<br><br><\/p><p>\"\"<\/p><p>\"\"<\/p><p>\"\"<\/p><p>\"\"<\/strong><\/p><p> <\/p><p>Any suggestion on how to fix the problem.<\/p><\/p>\n","protected":false},"template":"","class_list":["post-396870","topic","type-topic","status-publish","hentry","topic-tag-abaqus","topic-tag-creep","topic-tag-creep-analysis-1","topic-tag-creep-constants","topic-tag-creep-simulation-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["396870"],"_bbp_author_ip":["14.139.249.194"],"_bbp_last_reply_id":["396891"],"_bbp_last_active_id":["396891"],"_bbp_last_active_time":["2024-12-10 07:45:07"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["437039","58821"],"_btv_view_count":["600"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["58821"]},"test":"rohanagrawal134gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/396870","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\/396870\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=396870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}