{"id":157900,"date":"2022-06-06T09:57:59","date_gmt":"2022-06-06T09:57:59","guid":{"rendered":"\/knowledge\/forums\/topic\/how-to-define-spot-weld-connection-between-three-or-more-shell-parts-in-explicit-dynamics-and-workbench-ls-dyna\/"},"modified":"2022-06-06T09:57:59","modified_gmt":"2022-06-06T09:57:59","slug":"how-to-define-spot-weld-connection-between-three-or-more-shell-parts-in-explicit-dynamics-and-workbench-ls-dyna","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-to-define-spot-weld-connection-between-three-or-more-shell-parts-in-explicit-dynamics-and-workbench-ls-dyna\/","title":{"rendered":"How to define spot weld connection between three (or more) shell parts in Explicit Dynamics and Workbench LS-DYNA?"},"content":{"rendered":"

Spot welds are rigid constraints. They are created between pairs of nodes. Creating a spot weld connection between three shells means that there will be two spot weld connection definitions for the three nodes – one of the nodes will belong to two spot welds at the same time. Spot welds are however rigid constraints and the system will become over-constrained if a node belongs to more than one spot weld. This is not allowed in Explicit Dynamics and Workbench LS-DYNA.
Workaround: replace the two spot welds by a remote point involving the three nodes. In case of n shell parts, use a remote point to replace the n-1 spot welds which comprises the n points. Please note that the connection through remote points will not be breakable in contrast to spot weld definitions.<\/p>\n","protected":false},"template":"","class_list":["post-157900","topic","type-topic","status-publish","hentry","topic-tag-explicit-dynamics","topic-tag-spot-weld-connection"],"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