![]() ANSYS MAPDL has had a bolt modeling capability for some time that allows you to simulate a bolt as a cylinder with preload and everything. Classic newby mistake right? They model threads on 37 bolts and then try and set up contact on all of them. You can turn remeshing on based upon position, energy levels, or contact conditions.Īnd here is an example that ANSYS, Inc. This process is completely automatic and does not require the user interaction that rezoning does. The third and best addition is Automatic Rezoning or Mesh Nonlinear Adaptivity. When you read in a completely new mesh, you have to interpolate the stress field and then iterate till the stresses are accurate. The advantage of this approach is that the subsequent stress field that is placed upon the new mesh is already accurate at the nodes that existed for the original mesh, and are fairly accurately interpolated for the new nodes. The 2D example from the manual shows it best: It was available before with 2D elements. This is used for manual rezoning with the REMESH command. The next change was adding mesh splitting for 3D tetrahedral elements. It is very common to have that type of load on highly distorted geometry, so this is welcomed. The first change was a hole plug, you can now rezone areas that contain surface effect (SURF153/154) elements. Rezoning has been around for a while but at this release some holes are plugged and some big advances are made. Or it turns inside out and generates an error in the solver. It often gets so distorted that the elements are no longer accurate and crazy strains are calculated and the element literally blows up. ![]() The whole idea of rezoning is that when you have a part that sees a large amount deformation, the mesh often gets very distorted. This is my favorite change in R15, a mix of some improvements and some new capabilities. As always, you can learn more by attending one of the many upcoming ANSYS webinars or reading the release notes in the help. For this posting though, we are going to stay focused on the things that impact larger groups of users and/or expand capability in the code. The developers have been very busy and added a lot of useful features, and there are a large number of “Oh Yes!” capabilities in this release that different groups of users will be very excited about. Now it is time to take a good look at ANSYS Mechanical APDL, or MAPDL (classic ANSYS, black window ANSYS, or my favorite: ANSYS). On Tuesday we posted on what I thought were the 10 coolest features in ANSYS Mechanical for R15.
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