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disla
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Comments
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In dynamic analysis there are inertial forces. I would say the beam needs density too.
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Here some example
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Forget about fixed support. Set x,y=0.
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Thanks Victor, Circular pipe seems fine the whole range and the hallow Torsional Constant converge to the solid when diminishing internal radio. Seems Square is not so simple and people goes to tools based on the finite element method to compute th…
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I have confirmed that the formula is only valid for thin-walled Rectangular Tubes. 16. Hollow rectangle, thin-walled Roark's Formulas. @Victor _ ¿Does this value participate in any computation or is it just informative?
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Hi, If you are dealing with pipes and solid bars look at this recent post about accuracy of circular sections. https://calculix.discourse.group/t/psa-always-use-pipe-not-circ-for-circular-beam-section/1286 Not sure yet if this apply to the inter…
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You always learn something new Thanks
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The gradient, "second image" seems to have a more volumetric feeling probably by an additional external light. ¿Shouldn’t the lighting effects be reserved for the modeling window?
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I guess if the reason is not the lightning effect more than the interpolation process ?¿?. For two homogeneous spheres with uniform solution the final tone is different too.
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Hi Victor, I would like, if possible, that : Components&Materials Load&Constrains Named Selections to be properly sorted when they are renamed with numbers.
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Updated for v17. Now it works again. From Victor solution ( https://mecway.com/forum/discussion/1180/two-concentrated-loads-fluxes-different-amplitudes) "Version 16/17 applies shell edge forces in a more accurate way that includes moments that acc…
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HI dculp, ¿Could you give it a try to the following custom gmsh commands? I have try some models and it respects the edge lenght in the inside volume with a pretty mesh too. You will need to -Install gmsh and point to gmsh.exe in tools>option…
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HI, I have tried using the beam option to model the bolts on a larger scale problem. 20 sets of two plates bolted with 32 bolts each one and loaded in different loading conditions. The model contains 640 thermally preestresed bolts and took 7 minu…
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Hi Swami, You have another option in which the bolts are fully beam elements. The internal protrusion of the nut is used as contact area. There is a liml file in there: https://mecway.com/forum/discussion/comment/6057/#Comment_6057 Not sure how i…
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Hi Mishal, Although this method is suggested in the ccx manual there were some concerns abouts it’s suitability. You should test it before applying to check its performance. https://calculix.discourse.group/t/square-hollow-section-chassis/1246 Th…
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Hi Victor and thanks for your response. I have been able to find the plastic strain tensor with the help of the Calculix forum people. It is inside the SDV internal variables. I would like to do some operations with those components, and I find a …
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mmmh, . My file also has some moment involved.
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Just wanted to add that the problem solves without any issue in Static.
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HI, ¿Does anybody know how to keep the cmd window open at the end of the meshing process so one can review any warning and the abstract ? Thanks
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Your comparison between merging the nodes and the elastic contact has convinced me. Once the stresses arising by an unproper selection of master and slave are removed , the stresses due to different material properties are totally real. Thanks Vic…
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The first picture of the post is an example. Tie and Elastic with high tangential stiffness might warranty the bodies keep together but it can make some stresses to arise at the contact area. Displacements continuities are usually ok. *SURFACE BE…
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HI Victor, I would like to be able to set up the *SURFACE BEHAVIOR,PRESSURE-OVERCLOSURE=TIED + the value of the tangential stifness (even remove it). I have not found other option than OVERCLOSURE=LINEAR + automatic tangential stifness but it is to…
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Hi cwharpe, For me, MECWAY + topic directly in Google works better than the search bar inside the forum.
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Thanks Victor, I think selecting SI(mm) as unit system could extend the range of values that work well.
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Oh, so you have the custom palette already in use as default. mhh
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I propose to store the inverted scheme in the Custom Colors. Last option below ....., Red-Blue, Grey Scale. This doesn't mean it has to be the default. You can keep the Rainbow as usual and switch to custom depending on your needs. I have created a …
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Hi, You are progressing very fast. Be careful. There is a very common mistake. You have applied a TOTAL vertical force of -2.5KN to a “Set of 4 nodes”. That means each node gets -2.5Kn/4 = -0.625 kN. If you want -2.5KN on each node you need to …
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Hi dculp, There is a way to do this. My first response was probably too precipitated as sorted the problem immediately but for a more permanent solution you could create a custom color legend and save it inside the default model folder to be loaded…
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Hi LHartley, A must sanity check is to verify that the action/reaction principle is fulfilled. To check this, create a new named selection for the nodes of interest (I named them Reaction_Force) , recalculate, and then go to Solution/Sum menu to ex…
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First step - will change the rotation of the L members but I have another question. Should I set it to 0 or 90? Angle normally would be +/-45º , +/-135º. It aligns the flanges with the Cartesian planes. If you show the beam thickness you can see …
