{"id":398238,"date":"2024-12-23T02:35:00","date_gmt":"2024-12-23T02:35:00","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/spur-gear-analysis-contact-stress\/"},"modified":"2024-12-23T12:20:45","modified_gmt":"2024-12-23T12:20:45","slug":"spur-gear-analysis-contact-stress","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/spur-gear-analysis-contact-stress\/","title":{"rendered":"Spur Gear Analysis (Contact Stress)"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;Hello,&lt;br&gt;I attempted to simulate a spur gear based on a research paper where the contact stress is reported as approximately 1250 MPa; however, I am consistently obtaining 620 MPa. Here are the details of the gear that i considered. Case B is considered ie pressure angle of 20 degrees.&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/23-12-2024-1734920715-Screenshot 2024-12-23 072917.png\" alt=\"\" \/>&lt;br&gt;The contact stress according to the paper is&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/23-12-2024-1734920907-Screenshot 2024-12-23 072959.png\" alt=\"\" \/><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/23-12-2024-1734920920-Screenshot 2024-12-23 073014.png\" alt=\"\" \/>&lt;br&gt;I even followed steps of previous posts here in ansys help, including using joints and joint loads for the moment, finely meshing the specific tooth, setting interface treatment to touch, enabling large deflection, and applying the moment to push the contact pair. Here is my setup in ansys.&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/23-12-2024-1734920850-Screenshot 2024-12-23 073632.png\" alt=\"\" \/>&lt;br&gt;I also experimented with material properties but wonder if, apart from modulus of elasticity, Poisson&#8217;s ratio, and ultimate tensile strength, there are additional material properties I should define for accurate results.Despite running multiple iterations and exploring various contact options, I couldn&#8217;t achieve the expected results. I even tested another model for verification but faced similar discrepancies.&lt;br&gt;here are the contact options i implemented and i actually tried implementing normal stiffness factor of 1.&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/23-12-2024-1734921140-Screenshot 2024-12-23 073832.png\" alt=\"\" \/>&lt;br&gt;&lt;br&gt;I switched on the auto time stepping along with it i also enabled all the output controls..here is the result i am getting.&lt;br&gt;&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/23-12-2024-1734921248-Screenshot 2024-12-23 074021.png\" alt=\"\" \/>&lt;br&gt;I would appreciate the community&#8217;s help in this matter. Thank you&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-398238","topic","type-topic","status-publish","hentry","topic-tag-Structuredmeshing-2","topic-tag-contacts","topic-tag-spur-gear-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["398238"],"_bbp_author_ip":["2405:201:c021:e07b:3853:b62d:5573:ad9b"],"_bbp_last_reply_id":["403465"],"_bbp_last_active_id":["403465"],"_bbp_last_active_time":["2025-01-04 12:28:48"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["105471","3796"],"_btv_view_count":["999"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["3796","105471"],"_edit_last":["3796"],"_bbp_revision_log":["a:1:{i:398295;a:2:{s:6:\"author\";i:3796;s:6:\"reason\";s:0:\"\";}}"],"_bbp_notification_enabled":["105471"]},"test":"harshanagasai668gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398238","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398238\/revisions"}],"predecessor-version":[{"id":398295,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398238\/revisions\/398295"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=398238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}