{"id":285804,"date":"2023-05-25T18:01:41","date_gmt":"2023-05-25T18:01:41","guid":{"rendered":"\/forum\/forums\/topic\/explicit-vs-implicit-solver-for-static-simulations\/"},"modified":"2023-05-25T18:01:41","modified_gmt":"2023-05-25T18:01:41","slug":"explicit-vs-implicit-solver-for-static-simulations","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/explicit-vs-implicit-solver-for-static-simulations\/","title":{"rendered":"Explicit vs Implicit solver for static simulations"},"content":{"rendered":"<p>Hello all!<\/p>\n<p>I am currently developing a wrist model. Following other authors modeling techniques I plan to perform a static simulation. I am new with LS Dyna so I would appreciate some suggestions and general guidance on how to do this.<\/p>\n<p>I previously worked with Abaqus (standard which uses an implicit solver) in which I had the option to enforce a static case by using a keyword and then define a &#8220;dummy time&#8221; for the load to be applied. I guess the time wasn&#8217;t really important there because it was a static case.<\/p>\n<p>Within LS Dyna, however, I am not entirely sure what I should do. I am aware that LS Dyna uses an explicit solver by default. I noticed that the results change considerably depending on the time I choose to simulate in *CONTROL_TERMINATION and the curve load defined in *DEFINE_CURVE (a ramp curve together with *LOAD_NODE_SET). I am not sure if this is right so I started exploring the implicit solver since I saw that I can use a static option. So my questions are:<\/p>\n<ul>\n<li>Can I use both explicit and implicit solvers to perform a static simulation or is there a preferred option?\n<ul>\n<li>What kind of parameters should I choose for an implicit solver?<\/li>\n<li>If possible with explicit (what I have done so far), what variables do I need to check so that this simulation represents a static case or at least a quasi-static one? What about the time I need to simulate until the results stop changing?<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Thanks,&nbsp;<\/p>\n<p>Andres<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-285804","topic","type-topic","status-closed","hentry","topic-tag-biomechanics","topic-tag-static-structural","topic-tag-structural"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["280671","181804","275204"],"_bbp_author_ip":["23.217.200.46"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["4120"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["285804"],"_bbp_forum_id":["27814"],"_bbp_engagement":["181804","275204","280671"],"_bbp_voice_count":["3"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["291014"],"_bbp_last_active_id":["291014"],"_bbp_last_active_time":["2023-06-29 20:55:53"]},"test":"andres-menattu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/285804","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\/285804\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=285804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}