{"id":38237,"date":"2019-10-10T13:25:46","date_gmt":"2019-10-10T13:25:46","guid":{"rendered":"\/forum\/forums\/topic\/mesh-improvement\/"},"modified":"2019-10-10T13:25:46","modified_gmt":"2019-10-10T13:25:46","slug":"mesh-improvement","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mesh-improvement\/","title":{"rendered":"mesh improvement"},"content":{"rendered":"

Hi!<\/p>\n

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I’m trying to simulate the deformation of a hyperelastic material due to a large deformation. Since during the displacement divergence occurred due to highly distorted elements (figure a) within the object I tried to create a simpler model to check if issues are related to the geometry of the object. Thus I’ve realized a parallelepiped lying over another parallelepiped acting as a base with a fixed support (structural steel) and I’ve inserted a force acting perpendicularly over the face of the hyperelastic parallelepiped. If I set a value of -0.5 Newton as a force acting in -Z convergence occurs and the parallelepiped deforms (large deflection on, bonded contact), but increasing the force value, errors reporting the presence of highly distorted elements appears and the simulation diverges (figure b).<\/p>\n

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\"highly<\/p>\n

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\"Figure<\/p>\n

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I thought that in my first simulation the distortion of the elements occurred due to the presence of a sharp edge, but now that I used just a box I don’t know. Is there a way to fix this problem? I tried with mesh refinement and by increasing the load step size but it diverges too. Does it exists a tool that make the edges round during meshing?<\/p>\n

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Just to be clear both the simulation include:<\/p>\n

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-hyperelastic material (mooney rivlin hyperelastic sample)<\/p>\n

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-large deformation on<\/p>\n

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-non linear adapative region do not provide any help<\/p>\n

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-1st simulation has two contacts: the upper is frictional with friction coefficient 0.2, the lower is bonded. Both are closed.<\/p>\n

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-simplified version has just one bonded contact with the base<\/p>\n

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Hope to receive a feedbak. Thanks!<\/p>\n","protected":false},"template":"","class_list":["post-38237","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["10415"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["432"],"_bbp_subscription":["241639"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["38237"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","167024"],"_bbp_voice_count":["2"],"_bbp_reply_count":["12"],"_bbp_last_reply_id":["96672"],"_bbp_last_active_id":["96672"],"_bbp_last_active_time":["2019-10-22 12:57:52"]},"test":"nyla"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/38237","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\/38237\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=38237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}