{"id":397313,"date":"2024-12-12T17:30:44","date_gmt":"2024-12-12T17:30:44","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/stress-concentrators-at-the-end-of-a-pipe\/"},"modified":"2024-12-16T08:37:06","modified_gmt":"2024-12-16T08:37:06","slug":"stress-concentrators-at-the-end-of-a-pipe","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/stress-concentrators-at-the-end-of-a-pipe\/","title":{"rendered":"Stress concentrators at the end of a pipe"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;Hello everyone.&lt;br&gt;When calculating steel frames made of steel sections, I often encounter stress concentrators at the end of a pipe or at the contact where the pipe does not fit onto a curved surface:&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/12-12-2024-1734024630-mceclip0.png\" \/><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/12-12-2024-1734024630-mceclip1.png\" \/><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/12-12-2024-1734024630-mceclip2.png\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Please give me your advice on how to avoid this?&lt;\/p&gt;&lt;p&gt;1. Sometimes I use a stiffness factor of 0.02 and this helps to avoid a concentrator at the contact. Is this normal?&lt;\/p&gt;&lt;p&gt;2. I tried to make the mesh at the ends of the pipe finer, but this does not help&lt;br&gt;3. I tried asymmetric&lt;br&gt;4. I tried different types of contacts (normal Lagrange, extended Lagrange)&lt;br&gt;5. I did a lot of tests, but this did not help.&lt;\/p&gt;&lt;p&gt;Please give me your advice on how to avoid this?&lt;\/p&gt;&lt;p&gt;If this were only in one place, I could close my eyes to it and not take it into account and examine the rest of the structure, but this is a big hindrance.&lt;br&gt;Thank you.&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-397313","topic","type-topic","status-answered","hentry","topic-tag-mechanicalworkbench-1","topic-tag-contact","topic-tag-equivalent-stress","topic-tag-normal-lagrange-1","topic-tag-pipe","topic-tag-stress-concentration"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["397313"],"_bbp_subscription":["257647","37673","240"],"_bbp_author_ip":["162.19.102.37"],"_bbp_last_reply_id":["397514"],"_bbp_last_active_id":["397514"],"_bbp_last_active_time":["2024-12-14 17:31:59"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["3"],"_bbp_engagement":["257647","37673","240"],"_btv_view_count":["353"],"_bbp_topic_status":["answered"],"_edit_last":["52629"],"_bbp_revision_log":["a:1:{i:397576;a:2:{s:6:\"author\";i:52629;s:6:\"reason\";s:0:\"\";}}"]},"test":"javat33489gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/397313","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":2,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/397313\/revisions"}],"predecessor-version":[{"id":397576,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/397313\/revisions\/397576"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=397313"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}