CAE4U
We are Open Source Simulation enthusiasts. We can help you learn and Perform Engineering Simulations. We CAE4U are Open Source Simulation enthusiasts.
We can help you learn and Perform Engineering Simulations by offering earning videos, material and awareness videos on using open source software for FEA and CFD simulations, covering CAD modeling, Mesh Generation, Solving and post processing the results to obtain useful outcomes. Some of the great open source tools which we use are FreeCad, GMSH, Salome Platform, Calculix, OpenFoam and Paraview.
An engineer wonders, why FEA software needs material properties to be supplied, when the need is only normal stress in linear elastic simulation. Of course it may be not needed to use FEA software for such calculations, but let's say it was surprising to the engineer.
From the engineers perspective under linear elastic limits the normal stress is just load divided by the resisting area, remember the change in area doesn't alter the stress field here.
Further, why FEA packages even needs to use hooks law, which works relating stress with strain. Then, calculate stress from strain? Why strain has to be calculated when the desired result does not need such calculation?
Why can't the FEA package take easier routes?
More over if the analyst is forced by the software to provide the material detail, will any arbitrary values work?
Our first thought is, ofcourse FEA software are meant for complex simulations that is when simple routes are not readily available.
Second, all real world objects are made of some or other materials, so there is no wonder why FEA software is asking for it 😀.
But are there further interesting reasons behind, why this approach is being used?
Share your thoughts.
Cheers,
CAE4U
Funny but insightful words on importance of validating simulations...
"Everybody believes experimental results except the one who did it.
Nobody believes simulation results expect the one who did it...!!!"
CAE4U is glad to offer their work to Simulation enthusiasts. It is meant to act a good starting point covering various complex simulations for aspirant simulation engineers and researchers.
1. Bolt Joint Simulation Files (Using Calculix)
https://cae4u.gumroad.com/l/nnclm
2. Openfoam (XiFoam) Premixed Turbulent Combustion Files of Flame Holder
https://cae4u.gumroad.com/l/rpflt
3. Supersonic Flow around Projectile (using OpenFoam)
https://cae4u.gumroad.com/l/hpbem
4. Delta Wing Geometry and Meshing Script for GMSH
https://cae4u.gumroad.com/l/fwkfba
5. Salome Files For Autofrettage Simulation (Elasto-Plastic Simulation)
https://cae4u.gumroad.com/l/cmkdrdr
6. Elastic (Plastic) Analysis of internally pressurized Cylinder (Autofrettage)
https://cae4u.gumroad.com/l/urfbl
7. Elastic (Plastic) Analysis of internally and Externally pressurized Open Cylinder (Autofrettage)
https://cae4u.gumroad.com/l/hebuw
8. Autofrettage Simulation Files for Calculix
https://cae4u.gumroad.com/l/vdjtk
9. M219-Freecad Solid Model (For IDDES Tran-sonic cavity Simulation)
https://cae4u.gumroad.com/l/nqtoq
10. M219-Salome Mesh File (For IDDES Tran-sonic cavity Simulation)
https://cae4u.gumroad.com/l/exyge
11. M219-OpenFoam Files (For IDDES Tran-sonic cavity Simulation)
https://cae4u.gumroad.com/l/crjbwq
12. M219-CSV and Libre Calc Files (For IDDES Tran-sonic cavity Simulation)
https://cae4u.gumroad.com/l/jgxom
13. Waves in Solids (Simulation using Calculix)
https://cae4u.gumroad.com/l/fubjr
Stress Analysis of a Pressure Vessel using Calculix | | using Open Source Software |
Watch this Video on 👉YouTube https://youtu.be/rG08-6p9qPI
Engineering Stress analysis using open source software Calculix and GMSH.
This Video shows how to perform stress analysis on a 1/4th models of a pressure vessel subject to internal pressure.
Finite Element Method (FEM) was used for the structural analysis.
Software Used:
GMSH is used for geometric modelling and Meshing.
FEA solving and post processing.
The extensive post processing of results using stress linearization or direct comparison approach is NOT covered in this video.
For any specific details, Please contact CAE4U.
You can drop a comment or send email to, [email protected]
We welcome any of your comments/suggestion on the improvements.
Thanks for watching and hope the Video was useful.
Best Regards,
CAE4U
Failure Analysis of Laptop Desk with Freecad FEM | Freecad Fem | Product Design | Stress Analysis |
This Video shows how a real life failure of a product (laptop desk) can be
modeled using FEA and identify the critical locations.
The Analysis was carried out completely in Freecad FEM workbench.
Freecad was used to model the geometry.The model was simplified,
capturing only the necessary features to identify the critical
locations, which can eventually fail. The dimensions does not represent
the actual desk.
Free cad allows meshing through GMSH or Netgen. For this analysis
Netgen was used. Tetrahedral meshing was done with medium resolution.
The material selected was ABS plastic. Material properties was chosen
from FreeCad material library.
A dummy load of 70N was applied (in reality the load was not instantaneous
so it can be approximated as Static Load) and initially the face at the end
of the legs were fixed as Boundary conditions and analyzed. The results were not as correct. As an improvement in BC the inner edges of the legs were fixed and analyzed.The results were correct and reflected the reality in identifying the critical Locations.
It was observed that the horizontal movement of the leg is higher which causes high moment load to the leg and pad interface. Hence a horizontal member was added to limit the movement.
However the analysis has provided a deep insight to explore other design options of the desk to improve its strength for resisting any accidental overload.
Watch this Full Video on YouTube 👉 https://youtu.be/qz4ZhjQ2q3Y
Hope the Video was helpful. Thanks for watching.
Best Regards,
CAE4U
Reach us at [email protected] for Project assistance.
FEA analysis of Shaft using GMSH and Calculix | CAE4U |Torsional Loading | Shear Strength Assessment | Open source software
This Video is short tutorial on how to perform a Torsional Analysis
using Finite element Method.
GMSH and Calculix are used for the Analysis.
GMSH was used for preprocessing.
Calculix CCX was used for Solving.
Calculix CGX was used for Post processing.
The maximum shear stress and Von-mises stress are compared with theoretically calculated values.
Watch Full Video on YouTube 👉 https://youtu.be/zppuEW27pZA
Hope the Video was useful & "FOLLOW" our Page for more videos.
Best Regards,
CAE4U
Static and Modal analysis of a Bladed Disk using GMSH and Calculix || CAE4U || Calculix || GMSH
This video explains how to perform a Static structural and modal analysis of bladed disc using open source finite element analysis software.
This geometry does not represent any actual product. This analysis was done just to show how open source finite element analysis software
can be used for this kind of analysis.
The analysis is essentially 3D cyclic-symmetric analysis.
30 degrees Sector model of bladed disc configuration is considered for the analysis.
Uniform 2D structured mesh is used for this study.
structured Quadrilateral elements were used for better performance.
This analysis can be used to check the static strength,deformation and potential resonance.
The analysis considered only centrifugal load.
The mode shaped of a cyclic structural model is characterized by Harmonic index.
The results from modal analysis can be used to construct the Campbell diagram (some time called as Safe/Interference Diagram)
to check any possible resonance condition.
In this case the prestress effect is not considered.
For the study following open source software used,
Geometric Modelling and meshing - GMSH (https://gmsh.info/ )
Pre and post processing - CALCULIX CGX (http://www.dhondt.de)
Solving - CALCULIX CCX
Watch this Full Video on YouTube 👉 - https://youtu.be/aiBK7u6SE5I
Hope the Video was useful, Please drop your comments and "FOLLOW" our page.
Best Regards,
CAE4U
Modal Analysis of Circular Shell in Calculix || Natural Frequency and Mode shape || Mesh Sensitivity || Open source software
Hi Everyone,
This video explains how to perform a modal analysis of circular shell using open source finite element analysis software .
The analysis is essentially 2D.
Circular shell with clamped edge configuration is considered.
Uniform 2D structured mesh is used for this study.
structured Quadrilateral elements were used for better performance.
The results are compared with the theoretically available solutions and also the effect of mesh refinement was also studied.
Three different mesh grades are used and it was observed the finer meshing yields better results.
For the study following open source software used,
Geometric Modelling and meshing - GMSH
Pre and post processing - CALCULIX CGX
Solving - CALCULIX CCX
Watch this Full Video on YouTube 👉 - https://youtu.be/oBaDbQPh6Tk
Hope the Video was useful.
Please drop your comments and HIt "FOLLOW BUTTON" to get latest updates.
Best Regards,
CAE4U
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