{"id":32695,"date":"2019-01-16T17:04:50","date_gmt":"2019-01-16T17:04:50","guid":{"rendered":"\/forum\/forums\/topic\/calculating-incompressibility-parameter-for-ogden-material-model\/"},"modified":"2019-01-16T17:04:50","modified_gmt":"2019-01-16T17:04:50","slug":"calculating-incompressibility-parameter-for-ogden-material-model","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/calculating-incompressibility-parameter-for-ogden-material-model\/","title":{"rendered":"Calculating incompressibility parameter for Ogden Material Model"},"content":{"rendered":"<p>Hi all,<\/p>\n<p><\/p>\n<p>I have Silicone rubber (mu1= 140 psi, alpha1 = 1.6), and two polyurethanes (mat 1: mu1= 2000 psi,&nbsp;alpha1 = 1.4; mat 2: mu1 = 855 psi, alpha =1.04), and am required to have an Incompressibility Parameter D1 for all 3. Do you know how to calculate this\/get a ballpark estimate for Ogden 1st Order Materials?<\/p>\n<p><\/p>\n<p>Also, what does this number do and how significant is it for convergence behavior? For instance, If I say my D1 is 1E-08, am I going to have more convergence difficulties in comparison to if I chose D1 to be 1E-05, three orders of magnitude larger?<\/p>\n<p><\/p>\n<p>Kind Regards,<\/p>\n<p><\/p>\n<p>Zach<\/p>\n","protected":false},"template":"","class_list":["post-32695","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["4867"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0","0","0","0"],"_btv_view_count":["2246"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["32695"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","159194","160648"],"_bbp_voice_count":["3"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["75118"],"_bbp_last_active_id":["75118"],"_bbp_last_active_time":["2019-01-16 18:23:47"]},"test":"zjuv9021"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/32695","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\/32695\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=32695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}