Hello,<\/p>\n
I have a questions related to 2 topics.
1. geometry selection for bolt pretension
2. deleting the contacts<\/p>\n
Geometry selection for bolt pretension:<\/span><\/strong> What is the difference between selecting a surface and selecting a 3D body for applying bolt pretension? In my model, when I try to apply pretension on the screw shank surface, the selection is not accepted. I had to create a new coordinate system for the “shank surface” and apply pretension on the 3D screw body with newly created coordinate system.<\/p>\n The screw here is a an anchor screw. So the shank surface has been split to two parts. The bottom part was later considered as bonded contact and the remaning screw shank just stays inside the concrete block and the coordinate system was created for this remaining screw shank. Is this the reason for me to not able to select the surface?<\/p>\n Deleting the contacts<\/strong><\/span>: In continuation to setup explained above, the contact between remaining screw shank (part that is not bonded) and the surrounding concrete is getting tricky to handle. Since it an anchor screw, the contact area is assumed to be minimal with small friction coefficient. If I consider frictional contact and run the simulation, I have convergence problems. The case runs for around 2hrs on my laptop (8GB RAM, i5-4th gen) and the convergence is never reached. But if I ignore this contact by deleting it altogether (screw and concrete are still touching each other but contact is not modelled) the case converges. <\/p>\n Can someone tell if this is the correct approach?<\/p>\n Thanks in advance.<\/p>\n","protected":false},"template":"","class_list":["post-285686","topic","type-topic","status-closed","hentry","topic-tag-bolt-pretension","topic-tag-bonded-contacts-2","topic-tag-contact","topic-tag-frictional-contact"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["282789","170445"],"_bbp_author_ip":["23.47.145.55"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["5260"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["285686"],"_bbp_forum_id":["27796"],"_bbp_engagement":["170445","282789"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["286168"],"_bbp_last_active_id":["286168"],"_bbp_last_active_time":["2023-05-29 14:09:54"]},"test":"ksakethkgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/285686","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\/285686\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=285686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}