{"id":308850,"date":"2023-09-26T20:06:26","date_gmt":"2023-09-26T20:06:26","guid":{"rendered":"\/forum\/forums\/reply\/308850\/"},"modified":"2023-09-26T20:06:26","modified_gmt":"2023-09-26T20:06:26","slug":"308850","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/308850\/","title":{"rendered":"Reply To: Rock drilling"},"content":{"rendered":"<p>&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;Hello.&lt;\/span&gt;&lt;\/span&gt; &lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;I did some more tests.&lt;\/span&gt;&lt;\/span&gt; &lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;I also redesigned the LSTC setup, I added a drill instead of a bullet.&lt;\/span&gt;&lt;\/span&gt; &lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758132-mceclip0.png\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;I did tests on two particles: SPH and SPG.&lt;\/span&gt;&lt;\/span&gt; &lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;1.SPH.&lt;\/span&gt;&lt;\/span&gt; &lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;First I did a test with a low speed of 0.6 m\/s&lt;\/span&gt;&lt;\/span&gt; &lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;SPH particles scatter greatly, even the BOX card does not help, because of this the calculation is very slow.&lt;\/span&gt;&lt;\/span&gt; &lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758156-mceclip1.png\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;But the calculation is successful, the particles are drilled, the particles pull the ring along with them.&lt;\/span&gt;&lt;\/span&gt; &lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758180-mceclip2.png\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758203-mceclip3.png\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;Next, I tried to set the maximum speed for the rock drill, it is 40 m\/s and the drill does not see the particles and flies right through.&lt;\/span&gt;&lt;\/span&gt; &lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;I reduced TSSF to 0.6, I added VDS = 20 in contact, I tried increasing the contact hardness, but it only got worse.&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758235-mceclip4.png\" \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758248-mceclip5.png\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;2.SPG. I also performed the calculation at low speed first.&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758315-mceclip6.png\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758351-mceclip7.png\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/26-09-2023-1695758363-mceclip8.png\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;But the calculation is accompanied by NEGATIVE VOLUME warnings. And it ends in failure.&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;<strong>&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;So I have several problems: &lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;<\/strong>&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;1.When calculating at high speed, the drill does not see the contact. &lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;2.When calculating on SPG particles, the errors are NEGATIVE VOLUME and inadequate reaction of particles. &lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;3.The BOX map does not work and the calculation freezes until it calculates particles that fly far away. &lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;4.SPG particles penetrate into the ring, is another contact necessary? &lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;Dear ANSIS experts. If you can help me answer these questions. &lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;I will be able to simulate the drilling process. I can also attach mine to a file hosting service for you to view, please let me know. &lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;After you help me, I can start wearing. &lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;HwtZe&#8221; lang=&#8221;en&#8221;&gt;&lt;span class=&#8221;jCAhz ChMk0b&#8221;&gt;&lt;span class=&#8221;ryNqvb&#8221;&gt;Help me answer the questions, please.&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-308850","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=\"Hello. I did some more tests. I also redesigned the LSTC setup, I added a drill instead of a bullet. 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