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EDITED. 23/05/2022 Another Validation File. Static and Nonlinear Quasi-Static Analysis of Cantilever Plate. I’m looking at Stresses and through thickness Shear Stress in the shell. To obtain through thickness stress and shear detail in the shell …
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Thank you very much cwharpe. This is very simple to implement in an Excel file.
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Problem 8 Nonlinear Bending of an Isotropic Plate. Validation File. Thin shells shows important Locking for small mesh density (4x4). Acceptable results for displacements starts after the first refinements. Compared with the Analytical solution an…
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Hi Victor , You are right ..., in build shape functions are probably the natural way. I will look your code in detail. Thank you very much
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Hi, Mishal, Not sure if this is what you are looking for, but Cornelius provided an API Script that computes the "Sum forces over a given set of nodes"
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Thanks for your comments @prop-design “3) can't define element orientation for solids. it's locked to global xyz. so even though ccx uses solids for composites, you can't actually make and run a solid model yourself “ Solid Element orientation acc…
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Victor, ¿would it be possible to modify the parameter that scales the "Open cracks" separation. I think this way the user could adjust the required space to see in between the composite layers.
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Thank you very much once again Victor!!. Nice Job. Let me ask you something, ¿How does the Regular Time Points work for the Nonlinear Solver?. It seems to reset the given values each time I run the analysis. Thanks
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Hi Victor, I do not know if it may help but I have noticed that the thickness expansion in ccx and Mecway is not the same. There is a small difference. (See Pictures) Another curiosity is that the moment leaked to the ground depends on the model …
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Hi, I have taken a look to it and, to me, it seems a problem of the internal solver with pinned supports. Mecway is constraining rotations when it shouldn't. The simplified version of the handrail .liml file attached shows what I'm talking about. …
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Thanks for your comments prop_design and Victor. I’m doing some validation before proceeding with Calculix/Mecway so I’m not completely free to choose the configuration. I have clear now that I will avoid symmetry BC for Laminates or Orthotropic ele…
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Oppps, of course, Cyclic symmetry would show this mess too. I guess it could be solved orienting the properties orthogonal to the axis of symmetry, but I,m working on some examples with laminates at 0º/+45º/-45º/0º and weird combinations. That’s wha…
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Hi, I recently realized that applying symmetry boundary conditions to Orthotropic or Laminated elements couldn’t be safe as it changes the fibers direction, and it is not correct ¿isn't it?. ¿How do we manage this?.
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".....Do you have one especially in mind ?" Mainly the first two. Check the quality of your mesh and if you are experiencing convergence problems , solve the linearized model first (linear elasticity, isotropic material..) Try to understand how t…
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".... I would be happy to have a tool to assess qualitatively the effect of some parameters as battens stiffness, luff curves modification and so on, on the sail shape under load (FSI)" Woow.. . If you get this your sail will be the creme of the …
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This webpage could also be helpful to predict your Mast performance and to see in which category it lies. I would use it to calibrate/validate my profile. Try to reproduce fabricator IMCS. FEA model can give you all the numbers to compute IMCS. Not…
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Hi JMF11, Hard problem and not too much information on the net. I have never built or design a Sail, that is the first to say and I assume it can be a very deep subject as it involves FSI. I have found you asking a similar question on other forums …
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Hi, @MikeMcMullen . You are right. This would not capture reflections or shadowed areas unless the surface under traction is carefully assigned. Just direct blast impact and open structures where the pressure could freely develop. The attached fi…
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Thank you guys, I’m happy it’s being interesting and useful. This is the triangular load: A*unittriangle(C,(B*t-0.)-x) C Parameter to control the width in the step version of the load is now the first term into the unittriagle function. Don’t kn…
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Good morning Mariotte , I have managed to solve two of the initial difficulties before facing again the application of the Method proposed by the EN code. ( Perfect-Plasticity and Yield Criterion) 1-Perfect Plasticity can be set up in MECWAY by me…
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You can save and share your .liml file with the results directly in MECWAY free version as viewer. As far as they don't run the model, the results could be explored. I have tested on my old laptop where the licence is not installed anymore, and it w…
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Validation File with B32 element. Nonlinear Dynamic 3D. Computation time 5 min.
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Hello Lorenzo, “to have accurate stress results, at least three well-formed element in the thickness must be, so an initial max element length should be thickness/3” To check if your mesh fulfils this recommendation , you can use the Cutting Plane…
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Good morning, Victor,DaveStupple I guess Mr. GEORGIADIS will not mind if I post some extracts of his work. It is >20 years old paper. There are three integrals. -Over the whole volume when we add element by element . (see formula 4.8) -Over ea…
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It is better shown in the following equation 4.9. The overall Risk of Rupture in a model is a summatory of individual contributions of the Ne elements. Each of this individual contribution is a common function evaluated at each element (blue) and we…
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This paper is very good: PROBABILITY OF FAILURE MODELS IN FINITE ELEMENT ANALYSIS OF BRITTLE MATERIALS CONSTANTINOS GEORGIADIS Computers & Structures Vol. 18, No. 3, pp. 537-549, 1984. (Computer subroutines outlined) It describes the backgrou…
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Today dichtstoff at the ccx forum provided a solution to remove Displacement BC. *BOUNDARY, OP=NEW
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Hello Mariotte, That seems very ambitious!!. . Good for you. My goal some months ago was to introduce myself to the method and validate some of the examples, but unfortunately, I found some drawbacks that made me stop. First one , Linear-elastic…
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Hello PaulFlynn I think I see your problem. I faced it when I did the whole sequence. When transferring temperatures from solution to a Thermal transient study , the temperatures go to a "New Node Temperature BC" and it doesn't have the option "wit…
