{"id":317356,"date":"2023-11-13T02:05:25","date_gmt":"2023-11-13T02:05:25","guid":{"rendered":"\/forum\/forums\/topic\/where-does-specific-heat-arise-in-the-johnson-cook-material-model\/"},"modified":"2023-11-13T02:05:25","modified_gmt":"2023-11-13T02:05:25","slug":"where-does-specific-heat-arise-in-the-johnson-cook-material-model","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/where-does-specific-heat-arise-in-the-johnson-cook-material-model\/","title":{"rendered":"Where Does Specific Heat Arise in the Johnson-Cook Material Model?"},"content":{"rendered":"<p>Hello Forum,<\/p>\n<p>I have been running many impact simulations where the metals are best modeled with the Johnson-Cook model. What I noticed in many papers that provide JC params is that they forget\/omit the specific heat. However, when I try to run LS-DYNA without a CP, the job errors out with a message saying that the JC model has &#8220;an invalid specific heat value of 0.000E+00&#8221;.&nbsp;<\/p>\n<p>Can someone explain to me where the specific heat enters the equation and why there is a requirement for this on the JC model?<\/p>\n<p>Thanks,<\/p>\n<p>Peter<\/p>\n","protected":false},"template":"","class_list":["post-317356","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["39634","275204"],"_bbp_author_ip":["23.206.193.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["560"],"_bbp_likes_count":["0"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["317356"],"_bbp_forum_id":["27814"],"_bbp_engagement":["39634","275204"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["317466"],"_bbp_last_active_id":["317466"],"_bbp_last_active_time":["2023-11-13 16:08:16"]},"test":"yipxx043umn-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/317356","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\/317356\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=317356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}