{"id":32217,"date":"2018-12-18T13:31:56","date_gmt":"2018-12-18T13:31:56","guid":{"rendered":"\/forum\/forums\/topic\/mesh-design-issues-for-sc-static-structural\/"},"modified":"2018-12-18T13:31:56","modified_gmt":"2018-12-18T13:31:56","slug":"mesh-design-issues-for-sc-static-structural","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mesh-design-issues-for-sc-static-structural\/","title":{"rendered":"Mesh, design issues for SC static structural"},"content":{"rendered":"

I designed a geometry (shown below) in Ansys spaceclaim for static structural analysis based on a previous discussion, I would like to request guidance on the following issues,<\/p>\n

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Although some part of the reinforcements are protruding outside (I should have fine tuned the geometry to keep them inside), I just ran the simulation to check for any possible issue(s). Hope that the following issues are not due to this protruding problem.<\/p>\n

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1. In Mechanical, I got a weird mesh for the reinforcements (shown below in the first image). The mesh looked ok for the block (shown below in the second image along with the reinforcements). Please note that there was not any modification done for the mesh, so the following images are for the default mesh size or settings.<\/p>\n

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(2). I followed another discussion on adding same element to several geometries and added the code<\/a> mentioned there, for converting beam to link180. I would like to ask that;<\/p>\n

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(2-i) With in the code, the area is mentioned as (area = 3.1414), this area is also mentioned for the beam reinforcement which I designed in SC,<\/p>\n

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The beam diameter I would like to use if 0.035mm (radius of 0.0175mm). How can I change the default diameter size to my desired one? If I am not mistaking this was also mentioned by Peter in one of his reply to question number 3b<\/a>, but we couldn’t discuss on editing it. Please note that the number of reinforcements are in hundreds or thousands, a general way of assigning\/setting the diameter would be useful.<\/p>\n

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(3). How can I add contact between concrete and the reinforcements? Ansys doesn’t automatically detects the contact, I tried manually creating the contact but the reinforcements are not detected\/included by the contact wizard. I could only select the block for target and contact body. I tried hiding the block and then manually dragging and selecting all of the reinforcements but it didn’t work. Also, I creating named selections for both but it didn’t work either.<\/p>\n

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(4). One question regarding Spaceclaim (SC) I would like to add. Suppose if I am working in static structural and while designing geometries in the Design Modeller (DM), after I finish designing and close the DM, the geometry is automatically detected for the subsequent steps (like Model, Setup, Solution…). But if I finish designing geometry in SC and I close it the designed geometry is not detected by the subsequent steps. Any suggestion for this issue? As a temporary workaround, after finishing the designed geometry in SC I save the file and then import the geometry in Static Structural.<\/p>\n

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(5). For the trial run of the above model, I set the boundary conditions as the following,<\/p>\n

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Although, in some discussions the usage of displacement at the bottom is suggested instead of the fixed supports, but for the trial run I ran the simulation, which as per my understanding given the current boundary conditions, shall bring some results. But I had the following error.<\/p>\n

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A solver pivot warning or error has been detected in the UX degree of freedom of node 7206 located in Design2Beam (Circle). This is usually a result of an ill conditioned matrix possibly due to unreasonable material properties, an under constrained model, or contact related issues.  Check results carefully. You may select the offending object and\/or geometry via RMB on this warning in the Messages window.<\/p>\n

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