{"id":165158,"date":"2023-03-17T08:59:34","date_gmt":"2023-03-17T08:59:34","guid":{"rendered":"\/knowledge\/forums\/topic\/when-writing-out-an-ls-dyna-input-deck-why-do-we-use-both-contact_automatic_general-and-contact_automatic_single_surface-if-at-all-contact-duplication-should-be-avoided\/"},"modified":"2023-07-31T12:30:42","modified_gmt":"2023-07-31T12:30:42","slug":"when-writing-out-an-ls-dyna-input-deck-why-do-we-use-both-contact_automatic_general-and-contact_automatic_single_surface-if-at-all-contact-duplication-should-be-avoided","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/when-writing-out-an-ls-dyna-input-deck-why-do-we-use-both-contact_automatic_general-and-contact_automatic_single_surface-if-at-all-contact-duplication-should-be-avoided\/","title":{"rendered":"When writing out an LS-DYNA input deck, why do we use both *CONTACT_AUTOMATIC_GENERAL and *CONTACT_AUTOMATIC_SINGLE_SURFACE. If at all contact duplication should be avoided?"},"content":{"rendered":"

The primary reason for writing out both contact cards is because single surface contact doesn’t work well with beams. If you want to remove one of them, you can use the contact properties command snippet on the body interaction, and use the proper type on it, i.e., to only write one of them.<\/p>\n","protected":false},"template":"","class_list":["post-165158","topic","type-topic","status-publish","hentry","topic-tag-2019-r1","topic-tag-explicit-ls-dyna","topic-tag-lsdyna","topic-tag-mechanical","topic-tag-structural-mechanics","topic-tag-workbench-ls-dyna-act-ext"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t