{"id":343711,"date":"2024-01-08T21:16:53","date_gmt":"2024-01-08T21:16:53","guid":{"rendered":"\/forum\/forums\/topic\/discrepancy-between-lsprepost-and-hand-calculations-shell-element-stress-output\/"},"modified":"2024-01-08T21:19:32","modified_gmt":"2024-01-08T21:19:32","slug":"discrepancy-between-lsprepost-and-hand-calculations-shell-element-stress-output","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/discrepancy-between-lsprepost-and-hand-calculations-shell-element-stress-output\/","title":{"rendered":"Discrepancy between LSPrepost and hand calculations -Shell element stress output"},"content":{"rendered":"<p>Hi<\/p>\n<p>I perofrmed some analysis in LSDyna. Upon checking the Von Misses stresses, I found that they do not match with the value I calculated using standard von misses stress formula as below:<\/p>\n<p><a class=\"wp-colorbox-image cboxElement\" href=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/01\/08-01-2024-1704748258-mceclip0.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/01\/08-01-2024-1704748258-mceclip0.png\"><\/a><\/p>\n<p>I used fully integrated shell element (ELFORM = 16) with two integration points. I opened the elout file where I found that LSDyna wrote stress output (sigma-x, sigma-y etc) at two integration points. It basically looks like below:<\/p>\n<p><a class=\"wp-colorbox-image cboxElement\" href=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/01\/08-01-2024-1704748490-mceclip1.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/01\/08-01-2024-1704748490-mceclip1.png\"><\/a><\/p>\n<p>So, when I checked any element say element 1 and plot von misses stress variation with time in LSPREPOST. I found that it does not match with what I got using elout stress values in von Misses stress formula.&nbsp;<\/p>\n<p>Can anyone help me in this regards?<\/p>\n","protected":false},"template":"","class_list":["post-343711","topic","type-topic","status-closed","hentry","topic-tag-lsdyna"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["37124","275204"],"_bbp_author_ip":["23.206.193.154"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1406"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1704748680:190093"],"_bbp_topic_id":["343711"],"_bbp_forum_id":["27814"],"_bbp_engagement":["37124","275204"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["343853"],"_bbp_last_active_id":["343853"],"_bbp_last_active_time":["2024-01-09 17:02:34"]},"test":"mmia1lsu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/343711","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":2,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/343711\/revisions"}],"predecessor-version":[{"id":343714,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/343711\/revisions\/343714"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=343711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}