{"id":343036,"date":"2024-01-03T20:51:20","date_gmt":"2024-01-03T20:51:20","guid":{"rendered":"\/forum\/forums\/topic\/discrepancy-between-creep-strain-ansys-vs-creep-model-simple-rod-in-tension\/"},"modified":"2024-01-03T20:51:20","modified_gmt":"2024-01-03T20:51:20","slug":"discrepancy-between-creep-strain-ansys-vs-creep-model-simple-rod-in-tension","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/discrepancy-between-creep-strain-ansys-vs-creep-model-simple-rod-in-tension\/","title":{"rendered":"Discrepancy between creep strain – ANSYS vs creep Model – Simple rod in tension"},"content":{"rendered":"

Hello everyone,<\/span><\/p>\n

 <\/span><\/p>\n

I’m doing a “Static Structural” analysis on a simple rod, in order to study the creep behavior. <\/span><\/p>\n

I calibrated the constants of the creep model of the material (Time Hardening Power Law) using the ANSYS creep fitting tool, through experimental data.<\/span><\/p>\n

The constants of the Time Hardening Power Law model are C1 = 6.41E-05, 7.1E-10, C3 = -0.97186, and C4 = 0.<\/span><\/p>\n

The analysis has the following features: L = 300 mm, A = 36 mm^2, F = 120 N, E = 4900 MPa, Poisson’s coefficient = 0.4.<\/span><\/p>\n

The setting of the steps are in the picture attached (with large deformation “ON”).<\/span><\/p>\n

I find a similar example thanks to some ANSYS developers with an aluminium rod.<\/span><\/p>\n

When I calculate the creep strain with the Time Hardening Power Law, I obtain a specific value (0.0028 after 1000 seconds), while ANSYS gives me 0.0012.<\/span><\/p>\n

What could be causing this discrepancy? The example of the ANSYS developers gives perfect match with the same model.<\/span><\/p>\n

 <\/p>\n

Thanks in advance.<\/span><\/p>\n

\"\"<\/span><\/p>\n

 \"\"<\/span><\/p>\n","protected":false},"template":"","class_list":["post-343036","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["302591","99"],"_bbp_author_ip":["23.52.43.88"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["466"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["343036"],"_bbp_forum_id":["27791"],"_bbp_engagement":["99","302591"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["343494"],"_bbp_last_active_id":["343494"],"_bbp_last_active_time":["2024-01-06 11:45:21"]},"test":"jacopo-bardianipolimi-it"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/343036","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\/343036\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=343036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}