{"id":165914,"date":"2022-01-28T07:14:24","date_gmt":"2022-01-28T07:14:24","guid":{"rendered":"\/forum\/forums\/topic\/free-falling-box-ansys\/"},"modified":"2022-01-28T09:53:47","modified_gmt":"2022-01-28T09:53:47","slug":"free-falling-box-ansys","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/free-falling-box-ansys\/","title":{"rendered":"free falling box ansys"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hie I am using Ansys 2021 version for the free-falling box on a fixed ground for this model I have designed my model in CATIA and imported it into the Ansys design workbench<\/p>\n<ul>\n<li>step-1 I have used boolean operation and united all bodies as one and ground as separated <\/li>\n<li>step-2 I have imported the aluminum alloy properties into the body <\/li>\n<li>step-3 meshing I have used the tetrahedral method with a 5mm body size <\/li>\n<\/ul>\n<p>using this mesh size and aluminum properties I have applied courant -Friedrichs-Lewy (CFL) condition to get the time steps <\/p>\n<p>E= 7.1*e^10<\/p>\n<p>density (rho) = 2710 <\/p>\n<p>safety factor=1 <\/p>\n<p>delta t = 9.7*10^-7 I have considered as end time in Ansys <\/p>\n<p>number of cycles = T\/delta t = 2*10^6 <\/p>\n<ul>\n<li>please enlight me if I used the correct steps to find the end time step and no of cycle in Ansys is wrong please tell me.<\/li>\n<\/ul>\n<p><p><\/p>\n<\/p>\n<p>In my box design, I have used rivets as rivel for joining the sheet metals and in Ansys workbench, I haven&#039;t given any contacts between rivets and body to the ground as well by default Ansys have created the contacts <\/p>\n<ul>\n<li>if I have what type of contact do I have to use and what type of loads has to be given on rivets<\/li>\n<\/ul>\n<p><\/p>\n<ul>\n<li>step-4 I have given the boundary condition like velocity and standard gravity to all bodies.<\/li>\n<li>step-5 I have given the rigid to the ground and fixed condition to it.<\/li>\n<li>step-6 I have run the simulation but my box was passing through the ground without causing an impact. <\/li>\n<\/ul>\n<p><\/p>\n<p>I have uploaded images, help me out where I have done wrong.<\/p>\n<div data-embedjson=\"{&quot;url&quot;:&quot;\/forum\/wp-content\/uploads\/forum-uploads\/485\/QJ0ACCHXTVEU.png&quot;,&quot;name&quot;:&quot;1.png&quot;,&quot;type&quot;:&quot;image\/png&quot;,&quot;size&quot;:45746,&quot;width&quot;:591,&quot;height&quot;:460,&quot;embedType&quot;:&quot;file&quot;}\">\n<a href=\"\/forum\/wp-content\/uploads\/forum-uploads\/485\/QJ0ACCHXTVEU.png\" download aria-label=\"1.png\"><br \/>\n1.png<br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-165914","topic","type-topic","status-closed","hentry","topic-tag-error"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["2350"],"_bbp_likes_count":["0"],"_bbp_subscription":["1559","276885"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["165914"],"_bbp_forum_id":["27814"],"_bbp_engagement":["1559","13386","276885"],"_bbp_voice_count":["3"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["252394"],"_bbp_last_active_id":["252394"],"_bbp_last_active_time":["2023-03-02 21:17:51"]},"test":"sane0394gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/165914","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\/165914\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=165914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}