{"id":345445,"date":"2024-01-19T00:06:38","date_gmt":"2024-01-19T00:06:38","guid":{"rendered":"\/forum\/forums\/topic\/element-has-become-highly-distorted\/"},"modified":"2024-02-07T01:33:13","modified_gmt":"2024-02-07T01:33:13","slug":"element-has-become-highly-distorted","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/element-has-become-highly-distorted\/","title":{"rendered":"Element has become highly distorted!!!"},"content":{"rendered":"

Hello Friends,
I’m currently working on a project in which I try to simulate tube mechanical rolling expansion inside the tubesheet.<\/p>\n

“My model fails to converge due to highly distorted elements in the tube material.”<\/strong><\/p>\n

Here is a summary of the model setup:
1) There is no friction between the rollers and the inner surface of the tube.
2) A coefficient of less than 0.2 between the tube and tubesheet.<\/p>\n

3) Tube Thickness=2.5 mm and mesh element size 0.5mm.<\/p>\n

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4) Two movements are simulated in the model: a) Rotation around the tube axis. B) Radial to expand the tube. These roller movements have been modeled using joints.<\/p>\n

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4) Rollers are rigid.<\/p>\n

The following are the pre-settings that I tried to get the model to converge on:
1) I turned on the substeps: initial 100, minimum 20, and maximum 500.
2) I applied a nonlinear mechanical mesh with linear element order.<\/p>\n

The model fails on step 1, substep 5. <\/p>\n

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Your help is highly appreciated.<\/p>\n","protected":false},"template":"","class_list":["post-345445","topic","type-topic","status-closed","hentry","topic-tag-ansysworkbench-ansys-staticstructural","topic-tag-elastic-plastic-material","topic-tag-Multilinearisotropichardeningmodel-1","topic-tag-workbench"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t