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Andrea
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Try to change *Contact OUTPUT with *Contact FILE. I ran the solver and Mecway opens the frd file but is very slow. With CGX the solution on the attached picture Regards
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*ERROR in e_c3d: nonpositive jacobian determinant in element Free mesh is fast but can lead to neglect the quality. This error is often linked to a very small element volume. Refine the mesh is generally a good solution but is better to made a par…
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Maybe depends from the CCX compiled version for Windows. I use the versions contained on CalculiX Launcher and both iterative solvers are selectable. Iterative Cholesky is generally faster than Iterative Scaling.
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If the spooles solver requires a lot of memory try SOLVER=ITERATIVE SCALING It is slower than spooles (which is the default solver)
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Applying bending moment through the rot node the stress distribution is correct (see attached picture)
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RBE if you need a rigid behaviour of a surface or body. Ref Node if you want to apply forces or translational constraints to the RBE Rot Node if you want to apply moments or rotational constraints to the RBE Attached picture: a force is applied to …
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Maybe it depends from the format of frd file that's completely binary. See CCX manual: *Node print - *node output and paragraph "Output variables"
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With CCX solver *Time Points keyword could be a solution
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Example
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I select all variables ( or single column) on the SL table - CTRL+C- CTRL+V on excel
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I will point out the problem with more clarity. On more complex models is difficult to manage double nodes because merging nodes with tolerance too high could cause mesh problems. For example the two models on picture: after merging nodes with 0.5 m…
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Yes...is a tolerance problem but these nodes (double) have the same coordinates. Thanks
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Merging nodes in Salome there are no problems. In Mecway some elements continue to be disconnected. In fact the node number is different: Merging double nodes in Salome 1260 Merging double nodes in Mecway 1288
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Yes open crack!
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CGX shows deformations on both ways so the real behaviour is not an oscillation. Check the displacement magnitude vs time step on g direction to be sure. Simplify constraints to understand where is the problem. I ran the solver and is strange that a…
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Why *Rigid Body? Try locking the cube with simple node constraints.
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Which version of CCX are you using?
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Build your assembly. Leave unsuppressed only one component and export it as a step file. Make the same for all components of your assembly (only one at time). Import on Mecway one componet at time. All components will be placed correctly Regards
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twilliams55: for a more quick calculus there is an approximate formula on "Roark's formulas for stress and strain"
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...but don't forget classical theory. For my opinion is better to start by hand calculation (or spreadsheet) because the basic theory of spring is not difficult and the calculus of nominal shear stress is fast also for rectangular section (See Timos…
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About 140 ksi vM stress. But is linear elastic material model. I don't know the mechanical properties od PEEK but I think that is too high. Above all is to high the elongation of the spring under 5 lbf load. The spring become two times long Regards.
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Screen shot
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3 micron of dispacements? Maybe there is something wrong. Try to calculate reaction forces on this way: tools-sum-select Fz and the element set relative to the fixed face on z direction. Take into account that considering the spring as a hollow sect…
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Spring is in extension not in compression. In compression, with 5lbf, there will be a contact and the classic study is not applicable. Try to solve with classical theory of spring. I found a nominal shear stress about 90 ksi which is very near to th…
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I tried to apply 5lbf to the model and, without convergence study, I found a peak stress of 349.8 Ksi (first principal stress - NL analysis). The problem is to know the right conditions of work. Due to the geometry the spring loaded with a distrib…
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To trasmit bending moment is possible using a trick: strechting the beam inside the plate. This kind of joint is close to the real situation because beams are welded or bolted so is necessary to have an overlap Regards
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Use shell instead brick and creates a node where the beam encounters the plate Regards
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disla: Andrea I remember you posting some similar problem that was not with the linux version... the problem was different because runing the solver the solution was completely wrong (wrong eigenvalue and wrong deformed shape). This case is differe…
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The error found on buckling factor is not due to CCX version. Same error you will find using CCX under linux. Spurious mode were present also on previous version of CCX by MT Try with reduced integration elements
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OK... For Mecway user: definition of spring elements is not compatible with CCX from version 2.12. Regards
