{"id":364014,"date":"2024-04-24T17:13:03","date_gmt":"2024-04-24T17:13:03","guid":{"rendered":"\/forum\/?post_type=topic&#038;p=364014"},"modified":"2024-04-24T17:13:03","modified_gmt":"2024-04-24T17:13:03","slug":"dynamic-frictional-formulation-and-mesh-size","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dynamic-frictional-formulation-and-mesh-size\/","title":{"rendered":"Dynamic frictional formulation and mesh size"},"content":{"rendered":"<p>Hi,&nbsp;<\/p>\n<p>I am working on a cylinder shape frictional surface trying to fit it with the experimental data. However, my model can&#8217;t give me satisfying results.&nbsp;<\/p>\n<p>the friction coefficient is set to 0.3 and below is my command<\/p>\n<pre><span style=\"font-size: 12pt\">et, cid, 174<\/span><br><span style=\"font-size: 12pt\">RMODIF,cid,21,5.3&nbsp; <\/span><br><span style=\"font-size: 12pt\">RMODIF,cid,22,4 <\/span><\/pre>\n<p>Initially, I used a mesh resolution of 0 (approximately 8mm), which resulted in a response that deviated from the expected exponential decay. In an attempt to improve the accuracy, I increased the mesh fineness.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/24-04-2024-1713970338-mceclip0.png\" width=\"443\" height=\"199\"><\/p>\n<p>Here I used a mesh resolution of 1 (approximately 6mm)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/24-04-2024-1713977439-mceclip0.png\" width=\"450\" height=\"196\"><\/p>\n<p>However, the challenges arose when I attempted to further refine the mesh size. Specifically, when the mesh resolution was set to 2 (approximately 4mm) or higher, I encountered an error message and obtained results that were unexpected.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/24-04-2024-1713977618-mceclip1.png\" width=\"574\" height=\"133\"><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/24-04-2024-1713977763-mceclip2.png\" width=\"419\" height=\"185\"><\/p>\n<p>here is the result of mesh resolution = 3 ( about 3mm)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/24-04-2024-1713977963-mceclip3.png\" width=\"423\" height=\"183\"><\/p>\n<p>here is the result of mesh resolution = 4 (about 2.25mm)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/24-04-2024-1713976917-mceclip0.png\" width=\"421\" height=\"183\"><\/p>\n<p>I wonder if my command is incorrect or if I may mess up with other things that I can&#8217;t run the simulation properly. Why the simulation is able to run in coarse mesh but not in fine mesh?<\/p>\n<p>and what else I may need to set to make my simulation fit this orange line.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/24-04-2024-1713978612-mceclip0.png\" width=\"382\" height=\"253\"><\/p>\n<p>&nbsp;<\/p>\n<p>Thank you<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-364014","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi, I am working on a cylinder shape frictional surface trying to fit it with the experimental data. 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