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Comments
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Hi Sergio, The Strain Energy density can help you to locate the more interesting areas For an isotropic material the strain energy density function is directly and uniquely related with the principal stretches.
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Hi McNick, Now I get why you talk about "similar instability" . Looking at the base node where the heat transfer rate is higher I can see the oscillations. Looking at the period between them, it is clearly related with the time step which in my op…
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Hi McNick, Your model has element sizes of 500um width. According to the formula your mesh wouldn't be able to capture the cooling process correctly. Maybe it is the origin of the instability you mention. L<sqrt(k*t/(rho*Cp)) PET Mesh Size…
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Hi, Ccx and Mecway expands shell elements to solids creating new nodes. Regarding the node selection or removal, you could activate the coordinates check button and postprocess filtering by coordinates and then sorting by Y coordinate. ¿Which "…
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¿Is there a way to replace the geometry rather than reload it? This is probably not in the Best practice books but, when the model is not heavy, I put the different geometries all into the same file. This way: They can share the material defini…
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Hi McNick, One way to make your liml file lighter is to clear the result before sending. Right click on top of the solution in the tree menu and select clear. Regarding your model issues I would start with a 2D section of the zone of interest (hea…
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Hi gemada, ¿What happens with the unaffected face? It should be able to dissipate some heat. Maybe imposing radiation and convection similar to the other faces but with ambient temperature at 20ºC or so. Not sure what the code says about this face,…
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I have a possible cause. Annex A represent the temperature in the crosssection of beams and columns taking symmetry into account. As it is representing 1/4 of the beam (page 63) it means the simmetry is in both planes. That means the fire could pro…
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Hi, I have created an S6 element and calculix says number of nodes 70 while mecway says the correct number (15 after expansion to solid). 1760 S6 * 70 = 123200 Nodes - Shared nodes. Seems it is close to what is showing to you (116285). The number …
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You are Right. Now I see why. Scaling factor amplifies the displacement on each direction. As rotation (displacement) is bigger on top each section is bigger than the previous and result in a cone. I have check initial and final X,Y and Z of surfa…
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Hi Sergio, John, ¿ I’, curious about why this effect is showing up ? I have constrained the external surface of the cylinder with frictionless support, and it still shows a cone. ¿Is this a bug when plotting the displacements results? Regards
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Hi Hengre, I remember starting with Netgen using the attached link. There are some examples which really illustrates how the different parameters effect on the result, and you can download the step files to experiment by yourself. Keep in mind thi…
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Ok JohnM, I get it . Less Improvement suggestions and more autosuggestion to improve. Thanks both for your comments. I have just found that netgen can actually mesh internally a contour which solves most of my problem. I do not have fully contr…
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Hi Victor I would like if the LeftShift key could be used to select a group of Named selections. Actually, you need to select them one by one. I'm not sure if this depends on MECWAY but, ¿ is it possible to have the preview option in the file expl…
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Hi Victor, ¿Could you add the possibility to generate a Surface into the Mesh tool > Create > Surface from a given Contour (Sorted list of nodes)? I mean, being able to enter a sorted set of points that once closed would generate the inner …
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Hi Victor, You are right , nodal force was not the same . More nodes, more force. My mistake .Sorry. Example of plates under shear. Shell left side. Laminate with 6 layers of identical properties in the middle. Solid on the right side Through thic…
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Hi, I have made some simple test and readings to understand Victor's sentence "You may still get an improvement due to more integration points though". Using many layers of the same material do not provide more accuracy. In fact, it seems to be …
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O0h, too good to be true. . Edited
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I now realize that laminates could be an easy way to gain accuracy in a computation modeled with shell elements. I mean, ccx expands shells into solids. Defining the shell as a laminate with all its sheets with the same properties we could provide t…
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Hello Mishal, I have no idea if this would be later useful to you and how accurate would be the results but ¿have you consider to model with the set Plate/Epoxy/Beam Plate as a unique “laminate shell” where each layer has its own properties. There …
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Right click on the slide bar. You could also hide some previously defined components. Right Clik components in the solution tree.
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Formulas for BC in shells and solids are essentially the same. By "cylindrical directly" I mean that there is formulation already developed to see the results in cylindrical coordinates without having to transform anything. Just put the pipe cente…
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Yep. With Scale -1 you can save one operation if working with shells. Don't know about arbitrary plane sorry, just the ordinary three x y z.
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Hi Drudland, Welcome. Yes , you can do it . There are many references on the forum about it. Imposing the radial and circumferential displacement boundary condition is the only tricky part. You need to impose the displacement to each node on the…
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Rotate 180º
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Hi , UU and VV would have more sense for me if they are parallel and perpendicular to the weld. This way they will provide information about the evolution of the Normal and Shear Stress along the weld. If you are using triangles for example or you …
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You can also reorient the U and V local axis for the elements of interest before solving. This is done in element Mesh --> element properties. This way you can save some post processing and math.
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It happend also to me. I had to solve again once the table is created for the set to appear. I'm using mecway 13.1 and ccx 2.17. Regarding selecting nodes shared by two perpendicular shell elements, i'm not sure what uu, vv and uv means. Thats p…
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Hi JRP , I'm glad to see you found a workaround. You just need to give a name to the set of nodes. In your case you named them Weld 1, so it directly appears when creating a new table in the solution tree. See image. The only drawback is that nod…
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That’s because ccx expands the beam element into a solid element. Each node becomes 4 nodes. Before solving give to the node, a name into the Named selection tree. Once solved you can add a new table int the Solution tree by right click > New tab…
