{"id":29579,"date":"2018-06-26T13:17:59","date_gmt":"2018-06-26T13:17:59","guid":{"rendered":"\/forum\/forums\/topic\/global-von-misses-stress-constraint-in-topology-optimization\/"},"modified":"2018-06-26T13:17:59","modified_gmt":"2018-06-26T13:17:59","slug":"global-von-misses-stress-constraint-in-topology-optimization","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/global-von-misses-stress-constraint-in-topology-optimization\/","title":{"rendered":"Global von -Misses stress constraint in Topology optimization"},"content":{"rendered":"<p>Hi everyone,<\/p>\n<p><\/p>\n<p>i have to do a topology optimization of This turbine blisk.<\/p>\n<p><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/af7b9fd7-384f-4b60-836c-a90b00ab7124\/ddf28661-d77d-4bb0-9812-a90b00cf6c5a_foto-assieme.jpg?width=690&amp;upscale=false\" alt=\"\" width=\"538\" height=\"314\"><\/p>\n<p><\/p>\n<p>It is then divided in 60 sector. Below there is the image of a slice that i use for the analysis. I do a static structure analysis by setting the pressure on the blade &igrave;and the rotational velocity. I upload the image of the static structural settings.<\/p>\n<p><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/af7b9fd7-384f-4b60-836c-a90b00ab7124\/35fad6e8-c6c7-48c3-95d3-a90b00cefbbe_design-space.jpg?width=690&amp;upscale=false\" alt=\"\" width=\"506\" height=\"293\"><\/p>\n<p><\/p>\n<p>When i do the topology optimization i esclude the surfaces of the blade (suction side and pressure side, in red in the image ). Next i set the consatraints such the mass to retain and max stress. I have a question about the global stress constraint: it&nbsp; is applied to the whole body, design region and esclusion region? The result of the topolgy optimization of the blade it is a &#8220;shell body&#8221; with no material inside but only i thin surface, that is the esclusion region. It is obviusly that this kind of body cannot support the pressure acting on it, and think that the max Von-Mises stress is applied only in the s&igrave;design region. It is possible set the max stress on the esclusion region ?<\/p>\n<p><\/p>\n<p>Regards,<\/p>\n<p><\/p>\n<p>Francesco<\/p>\n","protected":false},"template":"","class_list":["post-29579","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["1748"],"_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":["2057"],"_bbp_subscription":["236450"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["29579"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","897","157426","167594"],"_bbp_voice_count":["4"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["92119"],"_bbp_last_active_id":["92119"],"_bbp_last_active_time":["2019-08-14 17:37:21"]},"test":"francesco"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/29579","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\/29579\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=29579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}