{"id":163949,"date":"2021-11-13T21:04:01","date_gmt":"2021-11-13T21:04:01","guid":{"rendered":"\/forum\/forums\/topic\/contact-analysis-best-practices\/"},"modified":"2021-11-15T03:19:45","modified_gmt":"2021-11-15T03:19:45","slug":"contact-analysis-best-practices","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/contact-analysis-best-practices\/","title":{"rendered":"Contact Analysis Best Practices"},"content":{"rendered":"
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Hello,<\/p>\n

I need to model a series of connecting parts that have clamps at their interfaces (an interlocking curvature). These parts will have some load and the joint connection maintains their precise alignment. I will need to compare my model to some test data and I need a relatively accurate model for that. I am familiar with the contact formulations, I have done some test cases, and I have read some documentation. <\/p>\n

I want to use Normal Lagrange contacts at the interface of the clamped components, but the convergence issues and solve time are probably going to be an issue because this model will be a bit large. <\/p>\n

I was wondering if anyone could advise on the following:<\/p>\n

1) What penetration is considered negligible? If I use Pure Penalty and enforce a Penetration Tolerance Value of 1e-4, is that sufficiently small? How would you expect this to compare to Normal Lagrange?<\/p>\n

2) I have read that the quadratic tetrahedral elements (10 node, I think?) are ideal for capturing a curvature, but is there any particular mesh that is recommended for contact accuracy (assuming the area is refined enough)? <\/p>\n

3) Does mesh inflation effect contact results? <\/p>\n

4) How does the Contact Match (mesh edit tool) affect the analysis? Is that recommended?<\/p>\n

5) Are there any good indicators that the resulting contact pressure plot is reliable?<\/p>\n

<\/p>\n<\/p>\n

Thank you for any input.<\/p>\n","protected":false},"template":"","class_list":["post-163949","topic","type-topic","status-closed","hentry"],"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