{"id":391477,"date":"2024-10-26T21:51:53","date_gmt":"2024-10-26T21:51:53","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/391477\/"},"modified":"2024-10-26T21:51:53","modified_gmt":"2024-10-26T21:51:53","slug":"391477","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/391477\/","title":{"rendered":"Reply To: Coupled field transient of brakedrum"},"content":{"rendered":"<p>&lt;p&gt;This looks mostly fine Rohan, the disc stops suddenly because it has a very small inertia.&lt;\/p&gt;&lt;p&gt;One suggestion is to have two separate materials for the disc and the pad.&nbsp; Edit the density of the material for the disc and add 3 zeros to the value so it is 1000 times heavier. If necessary, you can add another zero or two.&lt;\/p&gt;&lt;p&gt;You didn&#8217;t follow the times I laid out in the <a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/initial-angular-velocity-in-transient-structural\/\">other discussion<\/a>&nbsp;which I have copied below.&lt;\/p&gt;<\/p>\n<ul>\n<li>Step 1, ramp the Rotational Velocity from 0 to the desired value in 0.9 seconds.<\/li>\n<li>Step 2, hold the Rotational Velocity constant for 0.09 seconds.<\/li>\n<li>Step 3, Deactivate the Joint Load (unless you want it active) in 0.01 seconds.<\/li>\n<li>Step 4, Apply the brakes!<\/li>\n<li>All your braking data will start at t=1.00 seconds.<\/li>\n<\/ul>\n<p>&lt;p&gt;You are ramping up the rotational velocity in 0.04 seconds. That will cause a large stress in the massive disc.&lt;\/p&gt;&lt;p&gt;When you apply the brakes, you are ramping the force on over 0.01 seconds. Ramp the force on over 0.1 seconds.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-391477","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"This looks mostly fine Rohan, the disc stops suddenly because it has a very small inertia.One suggestion is to have two separate materials for the disc and the pad. Edit the density of the material for the disc and add 3 zeros to the value so it is 1000 times heavier. If necessary, you can\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/391477\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: Coupled field transient of brakedrum | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"This looks mostly fine Rohan, the disc stops suddenly because it has a very small inertia.One suggestion is to have two separate materials for the disc and the pad. Edit the density of the material for the disc and add 3 zeros to the value so it is 1000 times heavier. 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Edit the density of the material for the disc and add 3 zeros to the value so it is 1000 times heavier. 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Edit the density of the material for the disc and add 3 zeros to the value so it is 1000 times heavier. 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Edit the density of the material for the disc and add 3 zeros to the value so it is 1000 times heavier. If necessary, you can","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/391477\/","article:published_time":"2024-10-26T21:51:53+00:00","article:modified_time":"2024-10-26T21:51:53+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: Coupled field transient of brakedrum | Ansys Learning Forum","twitter:description":"This looks mostly fine Rohan, the disc stops suddenly because it has a very small inertia.One suggestion is to have two separate materials for the disc and the pad. Edit the density of the material for the disc and add 3 zeros to the value so it is 1000 times heavier. 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