June 2, 2020 at 6:44 pmehsan120Subscriber
I have a model that in different regions we have different materials. So, I have so many components made by patterns and other features, and corresponding materials are assigned to them. Since all of them are in contact with the neighbor surfaces (more than 2000 contact surfaces), and I don't have any relative displacement between contact surfaces, I usually have two choices: the bonded contact or the shared topology. As far as I know, the shared topology technique is the best choice to merge nodes between two shared regions and improve the mesh quality. However, whenever I want to use shared topology, it cannot find all the surfaces in contact and as a result, we still have bonded contacts automatically detected by Ansys. Do you have any solution for it? I also opened the geometry in DM and try to make a new part there but it takes forever to open the model in the mechanical. Even if I wait for a long time for mechanical to open the file, it give a funny model that has many extra lines and volumes.
Oh, by the way, it seems that if we have patterned layers that are not in contact, we have no choice but to make them independent of each other, and then shared topology will find shared surfaces of these pattern instances with the surrounding. am I right?
Last question: is there any way in Ansys to mesh part (component) by part?
Thanks in advance for the response
June 2, 2020 at 11:53 pmKarthik RAdministrator
There might be some issue with the geometry. Could you please open your geometry in SCDM and run the 'Check Geometry' option? Please select the main component, right-click, and perform the 'Check Geometry' operation in SCDM?
Please let us know what you find?
June 3, 2020 at 12:33 amehsan120Subscriber
Thanks for the response. As you suggested, I have used the "check geometry" option in the SpaceClaim on the main component. It says "no geometry problems found".
One question, if I couldn't find a way to solve this issue with the shared topology, can I stay with bond contact for now? Are these contact surfaces making any divergence problems?
June 3, 2020 at 1:15 ampeteroznewmanSubscriber
There is a third option that is not shared topology and not bonded contact.
That is Mesh Merge. If a global element size causes all the coincident edges to have an equal number of nodes, that will create coincident nodes. Mesh Merge is very robust at eliminating coincident nodes, and in doing so, connecting elements at geometry boundaries.
June 3, 2020 at 4:32 pmehsan120Subscriber
Thanks for the response. Honestly, the geometry is not that easy to define node merge easily. What I did usually for large models was to open it in DM and use "form a new part". However, this time, I don't know why, after doing so and opening the model in the mechanical (I have to wait for more than 1-2 hours for WB to transfer the data to the mechanical), some parts are disappeared and some extra lines are imported inside it. I am using Ansys 2020 R1. I have no idea whether I will get a proper result if I draw the CAD from scratch in design modeler or not.
- You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- Saving & sharing of Working project files in .wbpz format
- Solver Pivot Warning in Beam Element Model
- Understanding Force Convergence Solution Output
- An Unknown error occurred during solution. Check the Solver Output…..
- What is the difference between bonded contact region and fixed joint
- whether have the difference between using contact and target bodies
- The solver engine was unable to converge on a solution for the nonlinear problem as constrained.
- Colors and Mesh Display
- User manual
- material damping and modal analysis
© 2023 Copyright ANSYS, Inc. All rights reserved.