{"id":362250,"date":"2024-04-15T13:42:52","date_gmt":"2024-04-15T13:42:52","guid":{"rendered":"\/forum\/forums\/reply\/362250\/"},"modified":"2024-04-15T13:42:52","modified_gmt":"2024-04-15T13:42:52","slug":"362250","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/362250\/","title":{"rendered":"Reply To: Can somebody help me in Finding Stress intensity Factor of a crack &#8230;"},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;You need to insert a Fracture object so that the solver will recognize the highlighted vertex as a crack tip. To do this, right-click on Model and insert a Fracture object:&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/15-04-2024-1713188048-mceclip0.png\" width=\"763\" height=\"310\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Then right-click on fracture and choose Pre-meshed Crack:&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/15-04-2024-1713188095-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;For the crack tip node, you&#8217;ll have to convert the geometric Named Selection into a Nodal Named selection (by right clicking on it and choosing Create a Nodal Named Selection). Set the Crack Tip field to this Named Selection and also be sure to set up a local crack coordinate system (it should be placed on the open side of the crack with the x-axis in the direction of crack growth and y-axis normal to the crack plane):&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/15-04-2024-1713188265-mceclip2.png\" \/>&lt;\/p&gt;&lt;p&gt;To ensure accuracy, test different levels of mesh refinement around the crack tip. You also want to achieve convergence among contours 3-6. Please see the Mechanical documentation here for additional details: <a href=\"https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v241\/en\/wb_sim\/ds_define_pmcrack.html\">Defining a Pre-Meshed Crack<\/a>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-362250","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/362250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/362250\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=362250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}