{"id":169720,"date":"2022-05-23T14:49:36","date_gmt":"2022-05-23T14:49:36","guid":{"rendered":"\/forum\/forums\/topic\/what-is-the-relationship-between-energy-release-rate-and-fracture-toughness-sif-in-3d\/"},"modified":"2022-06-01T09:10:22","modified_gmt":"2022-06-01T09:10:22","slug":"what-is-the-relationship-between-energy-release-rate-and-fracture-toughness-sif-in-3d","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-is-the-relationship-between-energy-release-rate-and-fracture-toughness-sif-in-3d\/","title":{"rendered":"What is the relationship between energy release rate and fracture toughness (SIF) in 3D?"},"content":{"rendered":"<p>Hello<\/p>\n<p>I hope you are doing well. My query is what is the relationship between energy release rate (G) and Stress intensity factor (K) <strong>in 3D<\/strong>? The relationship is as shown below <a href=\"https:\/\/en.wikipedia.org\/wiki\/Energy_release_rate_(fracture_mechanics)\" target=\"blank\">https:\/\/en.wikipedia.org\/wiki\/Energy_release_rate_(fracture_mechanics)<\/a>.<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/391\/8NBOX8S1YK5T.png\" width=\"395\" height=\"105\" \/>G=k1^2\/E for plane stress<br \/>\nand<br \/>\nG=(k1^2)*(1-nu^2)\/E for plane strain<br \/>\n where E and nu are modulus of elasticity and Poisson ratio<br \/>\nBut all these relations are only for<strong><i> plane stress or plane strain<\/i><\/strong>. What is the relationship for <strong>3D problems<\/strong>? I am very confused. Please help.<\/p>\n<p>Regards<br \/>\nBhanu<\/p>\n","protected":false},"template":"","class_list":["post-169720","topic","type-topic","status-closed","hentry","topic-tag-energy-release-rate-2","topic-tag-fracture-mechanics","topic-tag-plane-strain-2","topic-tag-plane-stress-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["799"],"_bbp_likes_count":["0"],"_bbpmt_movedon":["2022-08-26 07:31:51"],"_bbpmt_movedfrom":["27820"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["169720"],"_bbp_forum_id":["27791"],"_bbp_engagement":["88","44992"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["215321"],"_bbp_last_active_id":["215321"],"_bbp_last_active_time":["2022-06-01 09:10:22"]},"test":"puhan"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/169720","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\/169720\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=169720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}