{"id":307885,"date":"2023-09-21T13:22:26","date_gmt":"2023-09-21T13:22:26","guid":{"rendered":"\/forum\/forums\/topic\/shell-element-with-large-distortions\/"},"modified":"2023-09-21T13:22:26","modified_gmt":"2023-09-21T13:22:26","slug":"shell-element-with-large-distortions","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/shell-element-with-large-distortions\/","title":{"rendered":"Shell Element with large distortions"},"content":{"rendered":"<p>Hello,<\/p>\n<p>I am simulating the deformation of a metallic tube in the low velocity range.<br \/>Unfortunately, large distortions occur at the shell elements (see figure).&nbsp;<br \/>These stretch to infinity and the voltage drops to 0.<br \/>These distortions occur during self-contact.<br \/>Attempts to counteract this by applying Hourglass were not really successful.<\/p>\n<p>A short excerpt from the K-File:<\/p>\n<p>*CONTROL_HOURGLASS<br \/>$# &nbsp; &nbsp; ihq &nbsp; &nbsp; &nbsp; &nbsp;qh &nbsp;<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;8 &nbsp; &nbsp; &nbsp;0.03<br \/>*CONTROL_SHELL<br \/>$# &nbsp;wrpang &nbsp; &nbsp; esort &nbsp; &nbsp; irnxx &nbsp; &nbsp;istupd &nbsp; &nbsp;theory &nbsp; &nbsp; &nbsp; bwc &nbsp; &nbsp; miter &nbsp; &nbsp; &nbsp;proj<br \/>&nbsp; &nbsp; &nbsp; 20.0 &nbsp; &nbsp; &nbsp; &nbsp; 1 &nbsp; &nbsp; &nbsp; &nbsp;-1 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp;16 &nbsp; &nbsp; &nbsp; &nbsp; 2 &nbsp; &nbsp; &nbsp; &nbsp; 1 &nbsp; &nbsp; &nbsp; &nbsp; 0<br \/>$# rotascl &nbsp; &nbsp;intgrd &nbsp; &nbsp;lamsht &nbsp; &nbsp;cstyp6 &nbsp; &nbsp;thshel &nbsp; &nbsp; &nbsp;<br \/>&nbsp; &nbsp; &nbsp; &nbsp;1.0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 1 &nbsp; &nbsp; &nbsp; &nbsp; 0<br \/>*CONTACT_AUTOMATIC_SINGLE_SURFACE_ID<br \/>$# &nbsp; &nbsp; cid &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; title<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1Self_Contact<br \/>$# &nbsp; surfa &nbsp; &nbsp; surfb &nbsp;surfatyp &nbsp;surfbtyp &nbsp; saboxid &nbsp; sbboxid &nbsp; &nbsp; &nbsp;sapr &nbsp; &nbsp; &nbsp;sbpr<br \/>&nbsp; &nbsp; &nbsp; &nbsp; 13 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 3 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0<br \/>$# &nbsp; &nbsp; &nbsp;fs &nbsp; &nbsp; &nbsp; &nbsp;fd &nbsp; &nbsp; &nbsp; &nbsp;dc &nbsp; &nbsp; &nbsp; &nbsp;vc &nbsp; &nbsp; &nbsp; vdc &nbsp; &nbsp;penchk &nbsp; &nbsp; &nbsp; &nbsp;bt &nbsp; &nbsp; &nbsp; &nbsp;dt<br \/>&nbsp; &nbsp; &nbsp; &nbsp;0.2 &nbsp; &nbsp; &nbsp;0.18 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 5.0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.01.00000E20<br \/>$# &nbsp; &nbsp;sfsa &nbsp; &nbsp; &nbsp;sfsb &nbsp; &nbsp; &nbsp;sast &nbsp; &nbsp; &nbsp;sbst &nbsp; &nbsp; sfsat &nbsp; &nbsp; sfsbt &nbsp; &nbsp; &nbsp; fsf &nbsp; &nbsp; &nbsp; vsf<br \/>&nbsp; &nbsp; &nbsp; &nbsp;2.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0<br \/>$# &nbsp; &nbsp;soft &nbsp; &nbsp;sofscl &nbsp; &nbsp;lcidab &nbsp; &nbsp;maxpar &nbsp; &nbsp; sbopt &nbsp; &nbsp; depth &nbsp; &nbsp; bsort &nbsp; &nbsp;frcfrq<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; &nbsp; 0.2 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; 1.025 &nbsp; &nbsp; &nbsp; 3.0 &nbsp; &nbsp; &nbsp; &nbsp; 2 &nbsp; &nbsp; &nbsp; 100 &nbsp; &nbsp; &nbsp; &nbsp; 1<br \/>$# &nbsp;penmax &nbsp; &nbsp;thkopt &nbsp; &nbsp;shlthk &nbsp; &nbsp; snlog &nbsp; &nbsp; &nbsp;isym &nbsp; &nbsp; i2d3d &nbsp; &nbsp;sldthk &nbsp; &nbsp;sldstf<br \/>&nbsp; &nbsp; &nbsp; &nbsp;0.0 &nbsp; &nbsp; &nbsp; &nbsp; 1 &nbsp; &nbsp; &nbsp; &nbsp; 2 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0<br \/>$# &nbsp; &nbsp;igap &nbsp; &nbsp;ignore &nbsp; &nbsp;dprfac &nbsp; &nbsp;dtstif &nbsp; &nbsp;edgek &nbsp; &nbsp; unused &nbsp; &nbsp;flangl &nbsp; cid_rcf<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; &nbsp; 0<br \/>*CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_ID<br \/>$# &nbsp; &nbsp; cid &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; title<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2dropmass<br \/>$# &nbsp; surfa &nbsp; &nbsp; surfb &nbsp;surfatyp &nbsp;surfbtyp &nbsp; saboxid &nbsp; sbboxid &nbsp; &nbsp; &nbsp;sapr &nbsp; &nbsp; &nbsp;sbpr<br \/>&nbsp; &nbsp; &nbsp; &nbsp; 13 &nbsp; &nbsp; &nbsp; &nbsp;10 &nbsp; &nbsp; &nbsp; &nbsp; 3 &nbsp; &nbsp; &nbsp; &nbsp; 3 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 2 &nbsp; &nbsp; &nbsp; &nbsp; 0<br \/>$# &nbsp; &nbsp; &nbsp;fs &nbsp; &nbsp; &nbsp; &nbsp;fd &nbsp; &nbsp; &nbsp; &nbsp;dc &nbsp; &nbsp; &nbsp; &nbsp;vc &nbsp; &nbsp; &nbsp; vdc &nbsp; &nbsp;penchk &nbsp; &nbsp; &nbsp; &nbsp;bt &nbsp; &nbsp; &nbsp; &nbsp;dt<br \/>&nbsp; &nbsp; &nbsp; &nbsp;0.2 &nbsp; &nbsp; &nbsp;0.18 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.01.00000E20<br \/>$# &nbsp; &nbsp;sfsa &nbsp; &nbsp; &nbsp;sfsb &nbsp; &nbsp; &nbsp;sast &nbsp; &nbsp; &nbsp;sbst &nbsp; &nbsp; sfsat &nbsp; &nbsp; sfsbt &nbsp; &nbsp; &nbsp; fsf &nbsp; &nbsp; &nbsp; vsf<br \/>&nbsp; &nbsp; &nbsp; &nbsp;1.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0<br \/>$# &nbsp; &nbsp;soft &nbsp; &nbsp;sofscl &nbsp; &nbsp;lcidab &nbsp; &nbsp;maxpar &nbsp; &nbsp; sbopt &nbsp; &nbsp; depth &nbsp; &nbsp; bsort &nbsp; &nbsp;frcfrq<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2 &nbsp; &nbsp; &nbsp; 0.1 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; 1.025 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; &nbsp; 2 &nbsp; &nbsp; &nbsp; &nbsp;10 &nbsp; &nbsp; &nbsp; &nbsp; 1<br \/>$# &nbsp;penmax &nbsp; &nbsp;thkopt &nbsp; &nbsp;shlthk &nbsp; &nbsp; snlog &nbsp; &nbsp; &nbsp;isym &nbsp; &nbsp; i2d3d &nbsp; &nbsp;sldthk &nbsp; &nbsp;sldstf<br \/>&nbsp; &nbsp; &nbsp; &nbsp;0.0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0<br \/>$# &nbsp; &nbsp;igap &nbsp; &nbsp;ignore &nbsp; &nbsp;dprfac &nbsp; &nbsp;dtstif &nbsp; &nbsp;edgek &nbsp; &nbsp; unused &nbsp; &nbsp;flangl &nbsp; cid_rcf<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; &nbsp; 0<br \/>*CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_ID<br \/>$# &nbsp; &nbsp; cid &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; title<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;3bottom<br \/>$# &nbsp; surfa &nbsp; &nbsp; surfb &nbsp;surfatyp &nbsp;surfbtyp &nbsp; saboxid &nbsp; sbboxid &nbsp; &nbsp; &nbsp;sapr &nbsp; &nbsp; &nbsp;sbpr<br \/>&nbsp; &nbsp; &nbsp; &nbsp; 13 &nbsp; &nbsp; &nbsp; &nbsp;11 &nbsp; &nbsp; &nbsp; &nbsp; 3 &nbsp; &nbsp; &nbsp; &nbsp; 3 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0<br \/>$# &nbsp; &nbsp; &nbsp;fs &nbsp; &nbsp; &nbsp; &nbsp;fd &nbsp; &nbsp; &nbsp; &nbsp;dc &nbsp; &nbsp; &nbsp; &nbsp;vc &nbsp; &nbsp; &nbsp; vdc &nbsp; &nbsp;penchk &nbsp; &nbsp; &nbsp; &nbsp;bt &nbsp; &nbsp; &nbsp; &nbsp;dt<br \/>&nbsp; &nbsp; &nbsp; &nbsp;0.2 &nbsp; &nbsp; &nbsp;0.18 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.01.00000E20<br \/>$# &nbsp; &nbsp;sfsa &nbsp; &nbsp; &nbsp;sfsb &nbsp; &nbsp; &nbsp;sast &nbsp; &nbsp; &nbsp;sbst &nbsp; &nbsp; sfsat &nbsp; &nbsp; sfsbt &nbsp; &nbsp; &nbsp; fsf &nbsp; &nbsp; &nbsp; vsf<br \/>&nbsp; &nbsp; &nbsp; &nbsp;1.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; 1.0<br \/>$# &nbsp; &nbsp;soft &nbsp; &nbsp;sofscl &nbsp; &nbsp;lcidab &nbsp; &nbsp;maxpar &nbsp; &nbsp; sbopt &nbsp; &nbsp; depth &nbsp; &nbsp; bsort &nbsp; &nbsp;frcfrq<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2 &nbsp; &nbsp; &nbsp; 0.1 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; 1.025 &nbsp; &nbsp; &nbsp; 1.0 &nbsp; &nbsp; &nbsp; &nbsp; 2 &nbsp; &nbsp; &nbsp; &nbsp;10 &nbsp; &nbsp; &nbsp; &nbsp; 1<br \/>$# &nbsp;penmax &nbsp; &nbsp;thkopt &nbsp; &nbsp;shlthk &nbsp; &nbsp; snlog &nbsp; &nbsp; &nbsp;isym &nbsp; &nbsp; i2d3d &nbsp; &nbsp;sldthk &nbsp; &nbsp;sldstf<br \/>&nbsp; &nbsp; &nbsp; &nbsp;0.0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0<br \/>$# &nbsp; &nbsp;igap &nbsp; &nbsp;ignore &nbsp; &nbsp;dprfac &nbsp; &nbsp;dtstif &nbsp; &nbsp;edgek &nbsp; &nbsp; unused &nbsp; &nbsp;flangl &nbsp; cid_rcf<br \/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.0 &nbsp; &nbsp; &nbsp; &nbsp; 0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/21-09-2023-1695302364-mceclip1.png\" width=\"1068\" height=\"605\"><\/p>\n<p>&nbsp;<\/p>\n<p>Maybe someone has an idea why this happens?<\/p>\n","protected":false},"template":"","class_list":["post-307885","topic","type-topic","status-closed","hentry","topic-tag-contact","topic-tag-element-distortion","topic-tag-shell"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["2803","178077"],"_bbp_author_ip":["168.143.243.14"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["793"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["307885"],"_bbp_forum_id":["27814"],"_bbp_engagement":["2803","178077"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["308493"],"_bbp_last_active_id":["308493"],"_bbp_last_active_time":["2023-09-25 22:49:18"]},"test":"noah-loeschau-irvfh-zwickau-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/307885","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\/307885\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=307885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}