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Showing results for tags 'mesh quality'.
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Many of the parts that I mesh contain a significant number of bolt holes. In order to make the highest quality mesh possible, I have found that it is far better to imprint a square around the hole rather than a circle. This square (with a hole in the middle) gets divided into four sections. The number of elements along each edge depends on the size of the hole, but for most of the holes I am dealing with, I can use two elements along the edge of the hole (making for 8 elements total around the hole), two elements on the "spokes" between the edge of the hole and the edge of the square, and three elements on each half of the edges of the square. As can be seen in the images below (associated model can be found here: Washer Mesh Comparison.hm), this allows for a mesh of far higher quality than a simple washer permits. The obvious downside is that it is much more tedious to produce. Therefore, I would very much like to find a means of automating this procedure. As such, I have the following questions: Is anyone aware of something that has already been written to do this so I don't have to write it myself? Given a line ID, is it possible to identify the planar surface associated with it? (Note: I want to distinctly identify the planar surface and not the cylindrical surface since I don't care about the cylindrical surface.) Given a surface ID, is it possible to get a list of lines that define the boundaries of that surface? Given two line IDs, is it possible to get the shortest distance between the two lines? Given two line IDs, is it possible to split the first line at the point nearest to the second line? I am fairly comfortable in TCL at this point, so that isn't an issue. Also, I'm well aware that doing things like determining the shortest distance between a circle and a straight line are relatively straightforward geometry calculations, but I'm primarily asking if there are built in functions to accomplish these things so I don't have to write the code myself. Sorry for all the questions, but if you can answer just one of them, I'd greatly appreciate it. Thanks!
i got a problem of 1% Jacobian while meshing a 2d plane surface of a 3d object which was to be spinned. so to avoid jocobian i started splitting the elements and it has passed the jacobian but i have a doubt whether non-connected nodes may raise any problem during solution. but for the element quality check these elements have passed
Hello, I've been trying to improve the quality of mesh for a vehicle frame. I built the FE model and found quiet a lot of quality errors most of which were warpage and Jacobian. I understand the importance of the two criteria. But I'm just not able to bring them down to 0. I've tried reducing the element size of the whole components. I have two questions in the process. 1. Can I keep the element size of the curved surfaces very low (around 0.1mm) while keeping the rest of the components (without any quality problem) somewhere around 2mm ? 2. What can be done to keep the model out of quality errors on the whole ? Because I have around 86 components to deal which will become tedious. Thanks in advance