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Comments
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For complex stiffening paterns or double curved shapes you can also draw your stiffener profile on a node and then Sweep it along a path drawn on the shell surface. Of Course you will need connected nodes along the path.
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Hi Nordlicht, Beam elements can't be offset. What I normally do is to align the closest set of nodes to the final stiffener position using Node's Coordinates/Mesh tools menu. Then, select the aligned nodes and press line/surface to get the common l…
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@dculp, (x,y,z) is a vector that goes from cero to the point. Radial direction. (x,y,0) is a vector that goes radially but constrained into the XY Plane. Radial direction in cylindrical coordinates. (-y,x,0) is a vector perpendicular to (x,y,0). T…
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* Can a 2-layer laminate work? There will be peak stresses close to the Laminates discontinuities. With solid elements those discontinuities between the healthy pipe and the corroded area can be smooth. If you have bending maybe, you want to look …
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I can only get CDIS,CSTR for Contact and Bonded Contact when there is a value of Normal Stiffness. Picture shows model without initial penetration and Bonded Contact and model with initial penetration of 0.01mm and Contact for the same range of st…
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Hi Dculp, Excuse me if some of my comments seems obvious to you, I’m also thinking in less experienced readers too. -You can review the Contact Displacement/Clearance value at any time step if you hide the master (right button/hide) in the Solutio…
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I would like to point that in no way this example is the resistance of the pin. The problem is not solved yet. It just confirms that Calculix computes correctly the friction force according to the values I have given as an example. It is the respons…
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Hi, I have done a set up I like to use when there is symmetry of revolution. Displacement (-y,x,0)=0. It is equivalent to set the rotation around the z axis =0. It removes the warning about incompatible BC. The Z axys needs special treatment. By …
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Hi Dculp, I’m not sure to correctly understand your simulation purpose. ¿What do you want to know? . I think that once you finish , you will not get more than the confirmation of something you already know. Maximum pulling force = Friction force be…
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HI, I have set up three cubes , elastic, Mazar, UnilateralMazar with values I consider reasonable according to the Excel and the attached document. All three have the same young modulus to have comparable deformations, at least in a first order app…
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Hi Manuel, I don't think it is practical to experience a new material behavior on a 1 Gb model. ¿Are we talking about Mazars or UnilateralMazars?. It is not the same UnilateralMazars *User Material, constants=9 , , , , , , , , Mazars *User M…
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As I comment , I think the proper way is to solve the simple cube and check it behaves as espected.
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Hi mmartin, This is a very very very simple liml file where UnilateralMazars "works" (better said - runs) for me. I think this is the proper way to proceed and understand the new material behavior. Maybe we could work all together to see how to s…
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There is nonlinear behavior, but you don’t see it because you are not looking at the nodes where the arch is failing. There are other material behaviors but I’m not Civil engineer and I don’t know how to set up them. Check ccx manual calling sha…
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Hi AndreaC91, Your vertical tandem load (2 x 3.000 kN) is actually 1 load of -600KN distributed into two nodes, meaning (2 x 300 KN) . When considering 3.000KN each one the bridge seems unable to carry the load. Regards
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Hi, @Sebastianmaklary , I understand you have run the static problem without contacts and without loads just to check the stiffness matrix assembles correctly. ¿Isn’t it? ¿Did you activate "split periodic faces" when exporting from Solidworks?. May…
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Another cool application of moving loads is that they can reproduce increasing hydrostatic pressure on a filling process. This is not proportional hydrostatic load P=p(z)*t , it is hydrostatic pressure P=p(x,y,z,t) generated by a fluid increasing le…
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1. For me it’s been a surprise. Maximum bending stress and maximum contact don’t occur at the same time. I guess the gear study needs then to be performed in different positions depending on what it is evaluated. 4. Right. I can control Friction wi…
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Thank you very much Sebastianmaklary, I really appreciate your comments and more knowing that you design gears. I would like to extensively comment and ask you, but I don’t want to abuse nor boring the users which I suppose are mostly interested on…
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Hi, I'm not sure if I’m doing something wrong or if it is not possible. In case it is not possible I would like if it could be enabled. In Mecway , when I do consecutive selections using Ctrl, any pre-selected elements contained in the new selectio…
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Hi, -Right. 5 is the number of modes required to be extracted. -There is no need to agree. I suggest to set Mecway Analysis setting to 1. -No, it is not overridden.I would say Mecway computes the number of modes indicated in the Analysis settings a…
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Something has changed positively in the new version. Nonlinear dynamics runs more stable with contacts, and I've been able to finish analysis that failed in the previous version. Not sure if Victor changed something , my laptop, Solver, good tips o…
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Hi, Vm and Stress is in red, but it works. This version is slightly different than Victor's proposal. It allows Mecway to generate the load cards and only adds the frequency at the end as an additional Step.
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I have finished the validation with a very good result. Deviation from expected maximum tooth-root stress σFP is 1.4%. Check has been done according ( ISO 6336-3) and the help of a free access online calculator. Details on the pdf. I have measured …
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Hi, That's a very interesting problem. ¿Are you designing a Control valve? I have tried with orthotropic shells with high E on thickness direction and they could be very useful as they preserve the thickness of the shell (needed to properly extrac…
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If you try this method refine enough the shells and check stresses in the area to discard any shell shear locking that could change the hyper elastic behavior.
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Hi mbeauvais, I would create a very thin and soft (E=0.01 Pa) shells to cover the holes. Those shells could provide the area if the nodes are merged with the main body. By other hand, if the thickness of that shell is known and is very thin, perime…
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Hi, This is how I have engaged the two gears. Mesh is very raw and model is not completed to keep it below 1000 nodes but it contains all the elements to show how I would do the set up. It runs in 30 sec. Notes. This is the nonlinear option wher…
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It has been 4 years since this post was published. I,m working on the validation but meanwhile, numbers seem reasonable. Gears are fully shells so I think I will manage to get a <1000 nodes file to share. <img src="https://mecway.com/foru…
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Hi Mike and thanks for your comment. I started again from Andrea file and one additional refinement makes the big difference. @Andrea. I have set up the whole model as Compression only and everything keeps below 0.02 MPa. If I set only the Arch…
