{"id":391982,"date":"2024-10-30T11:34:57","date_gmt":"2024-10-30T11:34:57","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/tensile-failure-in-ansys-but-not-in-reality-related-to-preload\/"},"modified":"2024-10-30T11:34:57","modified_gmt":"2024-10-30T11:34:57","slug":"tensile-failure-in-ansys-but-not-in-reality-related-to-preload","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/tensile-failure-in-ansys-but-not-in-reality-related-to-preload\/","title":{"rendered":"Tensile Failure in Ansys but not in reality related to preload"},"content":{"rendered":"<p>&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;hello eveyone,&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;I&acute;ve been simulating and studying the behavior of a part that suffers the force of preload, here are the main data:&lt;\/span&gt;&lt;\/p&gt;<\/p>\n<ul>\n<li>&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Material: AL6082-T6&lt;\/span&gt;<\/li>\n<li>&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Bolt: M8 12.9 quality&lt;\/span&gt;<\/li>\n<li>&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Yield strengh 250MPa&lt;\/span&gt;<\/li>\n<\/ul>\n<p>&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;To know the preload I have to apply, I used the T(torque)=K(friction coefficient)*D(diameter)*F(preload)&lt;\/span&gt;&lt;\/p&gt;<\/p>\n<ul>\n<li>&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;T=31Nm&nbsp;&lt;\/span&gt;<\/li>\n<li>&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;D=8&lt;\/span&gt;<\/li>\n<li>&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;K=0.15 (most websites say this is the most common)&lt;\/span&gt;<\/li>\n<\/ul>\n<p>&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Here is my problem: When i put the preload of 25KN Ansys says that it breaks because of the tensile strengh. I dont know if is somethng related to the material, the connections or the preload. &lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;The deformations are also no correlated to reality because if you put 25KNthe 3mm gap becomes 2mm but in reality is 1mm the final dimension. The connectors are configured like this:&lt;\/span&gt;&lt;\/p&gt;<\/p>\n<ul>\n<li>&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Between parts where movement and no stress happens &#8220;No separation&#8221;&lt;\/span&gt;<\/li>\n<li>&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Between the main body an the pipets &#8220;Frictional&#8221; and the coefficient 1,1 for aluminum-aluminum and 0,61 Steel-Aluminum&lt;\/span&gt;<\/li>\n<\/ul>\n<p>&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Here are the photos showing the main information:&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/30-10-2024-1730286356-mceclip0.png\" width=\"389\" height=\"173\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/30-10-2024-1730286402-mceclip1.png\" width=\"208\" height=\"164\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/30-10-2024-1730286769-mceclip2.png\" width=\"410\" height=\"185\" \/>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 8pt;&#8221;&gt;Material used for the body not the bolt, the bolt is AISI4037&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;The results: the sum of the deformations has to give 2&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/30-10-2024-1730287890-mceclip3.png\" width=\"336\" height=\"224\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/30-10-2024-1730287937-mceclip4.png\" width=\"410\" height=\"224\" \/>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;If someone knows what is wrong i would be delighted.&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Aitor&lt;\/span&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-391982","topic","type-topic","status-publish","hentry","topic-tag-ansysworkbench-ansys-staticstructural","topic-tag-bolt-pretension","topic-tag-mechanical","topic-tag-preload","topic-tag-tensile-test"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["461635","471944"],"_bbp_author_ip":["178.139.171.181"],"_btv_view_count":["276"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["391982"],"_bbp_forum_id":["27791"],"_bbp_engagement":["461635","471944"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["392676"],"_bbp_last_active_id":["392676"],"_bbp_last_active_time":["2024-11-04 19:58:40"]},"test":"gambra77gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/391982","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\/391982\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=391982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}