[Help] FEM transient analysis
Posted: Mon Jun 06, 2022 6:19 am
Hello,
I just started learning FreeCAD and sorry in advance if the problems I need help addressing is very trivial or have been answered before.
I am trying to do a thermo mechanical transient analysis on a simple model. I have set the thermo mechanical steady state to false with time end and time initial step 60 and 1 respectively. I would like to ask why are the CCX time results in weird intervals (1,2,3.5,5.75,etc) instead of (1,2,3,4,etc). Am I understanding the time initial step function incorrectly?
Also, is there a way to plot a graph with the CCX time results produced with Displacement against Temperature (and compiling all the CCX time results)?
Lastly, with regards to the temperature constraints, I would like to input a fluctuating temperature to the model. For example, a sin curve ranging from 290K to 300K with 295K as the initial temperature. I would like to see the model expand when it goes from 295K to 300K and contract from 295K to 290K, if possible. Sort of like a dynamic thermal expansion. Would I have to write inp file, elmer or play around with the python console?
Sorry again that I am lacking in understanding on FEM as I am very new to 3D modelling and FEM. Instructional videos would help greatly! Thank you.
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24267 +148 (Git)
Build type: Release
Branch: Branch_0.19.4
Hash: 476ecf091941bead59b14e44afa6064d5a66afa3
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.3
Locale: English/Singapore (en_SG)
I just started learning FreeCAD and sorry in advance if the problems I need help addressing is very trivial or have been answered before.
I am trying to do a thermo mechanical transient analysis on a simple model. I have set the thermo mechanical steady state to false with time end and time initial step 60 and 1 respectively. I would like to ask why are the CCX time results in weird intervals (1,2,3.5,5.75,etc) instead of (1,2,3,4,etc). Am I understanding the time initial step function incorrectly?
Also, is there a way to plot a graph with the CCX time results produced with Displacement against Temperature (and compiling all the CCX time results)?
Lastly, with regards to the temperature constraints, I would like to input a fluctuating temperature to the model. For example, a sin curve ranging from 290K to 300K with 295K as the initial temperature. I would like to see the model expand when it goes from 295K to 300K and contract from 295K to 290K, if possible. Sort of like a dynamic thermal expansion. Would I have to write inp file, elmer or play around with the python console?
Sorry again that I am lacking in understanding on FEM as I am very new to 3D modelling and FEM. Instructional videos would help greatly! Thank you.
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24267 +148 (Git)
Build type: Release
Branch: Branch_0.19.4
Hash: 476ecf091941bead59b14e44afa6064d5a66afa3
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.3
Locale: English/Singapore (en_SG)