{"id":49829,"date":"2020-11-13T19:59:06","date_gmt":"2020-11-13T19:59:06","guid":{"rendered":"\/forum\/forums\/topic\/why-are-time-hardening-creep-models-so-challenging-to-converge-sometimes\/"},"modified":"2020-11-13T19:59:06","modified_gmt":"2020-11-13T19:59:06","slug":"why-are-time-hardening-creep-models-so-challenging-to-converge-sometimes","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-are-time-hardening-creep-models-so-challenging-to-converge-sometimes\/","title":{"rendered":"Why are time hardening creep models so challenging to converge sometimes?"},"content":{"rendered":"<p>The time hardening creep models can sometimes be very challenging to converge because the time component can overwhelm the stress dependence &#8211; time marches on but the material algorithm can only adjust the stress to find the correct value of creep strain. For example, if a generalized time hardening is ecr = C1*sigma*t^r, then if t^r is large the material algorithm needs for find a very small value of sigma so that the creep strain is small enough to satisfy the constitutive equation. n The general guidance is that the time hardening formulations work best in constant stress or when the loading in the simulation is close to the experimental loading.n<\/p>\n","protected":false},"template":"","class_list":["post-49829","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["22069"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":["Bh?\""],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["877"],"_bbp_subscription":["236442"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["49829"],"_bbp_forum_id":["27791"],"_bbp_engagement":["99","5977"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["135071"],"_bbp_last_active_id":["135071"],"_bbp_last_active_time":["2020-12-04 15:55:53"]},"test":"jjdoyle"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/49829","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\/49829\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=49829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}