PrePoMax & CalculiX - Axisymmetry
ฝัง
- เผยแพร่เมื่อ 26 ส.ค. 2024
- A demonstration of the 2D capabilities of the PrePoMax pre and post-processor for the CalculiX FEM solver. A simple axisymmetric analysis of a pipe reducer is shown. For 2D analysis, the geometry must be created in the x-y plane (z = 0) and for the axisymmetric models, the symmetry axis is the global y-axis.
Download link and installation instructions for PrePoMax: prepomax.fs.um...
![ง้อ (ALRIGHT) - FOURTH Prod. by URBOYTJ [ OFFICIAL MV ]](http://i.ytimg.com/vi/Qs8ZeV6Dqj8/mqdefault.jpg)
This software is really incredibly good. Thank you.
Always look forward to the new releases and added functionality.
PrePoMax is leaps ahead of any pre/post processor in terms of user friendliness. I am keen to follow it's progress and have no reservations about advertising it's strengths to colleagues.
Well done Matej and thank you for your unwavering resolve to keep developing the software.
Wishing that you grow from strength to strength quickly and can commercialise it at some stage, but at a price the small business (or individual) can afford :)
The whole power of this software lies in the fact that it's the most user-friendly and advanced free and open source Finite Element Analysis solution. There are some low cost pre and postprocessing programs such as very advanced Mecway that uses the same solver. The point of free and open source software is that it provides an alternative to various commercial solutions and that students, hobbyists, researchers and sometimes also professionals can do their projects without having to worry about the license.
Another key point of open source software is that the users may contribute to its development making it even better. Consider the only truly free computer aided design program, for example, it's extremely advanced and allows people to learn and create fantastic designs without having to choose between more or less expensive commercial solutions.
@@Gumball_W agree, an example are perpetual & subscription based inconsistency. may cause a problem for small to medium firms, also an individual private practices. so there's many alternative for people who may chose the right ones.
Thank you all for all the nice words about PrePoMax. I really appreciate it and I am very happy you like it.
That's awesome, Thank you Dr. Matej
Great job Matej 👍🏻
Very interesting..
Wow, that was quick 😀 Thank you.
Thank you for your work, Matej!
Hi,
This comment just to thank you for this software !
Thank you, user feedback is very important and keeps open-source projects going and going and... 😁
So much thanks for implementing the interfaces of CalculiX 2D element, also i've been tested for STL file formats and working properly. however due to limitation of the file format itself, lack of smooth in curved object. additional smoothing group of node on selected curve using statistical mode as pre-estimated value of radius could make STL beat accuracy to STP/IGS.
If I understand correctly the problem is a coarse stl? Usually, it is possible to select the stl accuracy when exporting the geometry which might help with the issue. And one more good news, we have a working Forum where such questions could be posted: prepomax.discourse.group/
@@MatejBorovinsek sorry, i missed to mention midside nodes of quadratic element to follow curvature geometry.
thanks again for building a forum, more advanced in discussion features: image, input attachment and external links, etc.
there's also available CalculiX forums at Discourse, still i'm thinking unethical to fill up their space with many screenshot of external software. it may only appropriates for general questions of CalculiX CrunchiX and GraphiX user.
Thanks for the implementation of the feature ! During the process i got a nonpositive jacobian Error. After some troubleshooting i found that you sometimes have to flip the element normal ! Keep that in mind.
Which CAD software did you use to prepare he geometry and which file format ?
@@Gumball_W Hi i was using Siemens NX. The file format was .stp Greetings
That is something I was not aware of. I have tested the model with an inverted normal and it produced the error you mentioned for all types of 2D analysis. So I will add a check for the surface orientation during geometry or mesh import. Thank you for the solution.
☕+new video -> ♥️🙂
Where did the thickness come from in the results? It did not give the board thickness
The axisymmetry analysis assumes a 360° angle for the computation. The "thickness" is turned on at 3:22 and a 2° angle is written as a result.
@@MatejBorovinsek I see. It is not the thickness, but a display that can be changed (2 degrees). The shell thickness is the imported sketch.
@@wgmg7746 hi, if i may allowed to answer the question. the thickness is defined under Solid section menus, it may little bit confuse for new user since 2D element is not grouped by type of Plane or Axisym sections as the Shell or Membrane element does.
@@syont The same approach is used in Abaqus and CalculiX itself - thickness for 2D elements is specified using data line of *Solid section keyword. Adding separate section types would cause inconsistency with keywords.
@@wgmg7746, there is no thickness needed for the axisymmetric model. It is assumed that a body of 360° is analyzed so the equations assume a 360° body based on a meshed cross-section. When you turn on the 3D output of results CalculiX displays results on a 2° angle of the whole model and this 2° angle can not be changed.