Tested with CGX 2.19/ CCX 2.19
- Transient coupled thermo-mechanical analysis
- Bending of a plate due to one-sided heating
- Time history plot of excitation and deflection
- Cross thickness plot of temperature and stress
| File | Contents |
|---|---|
| pre.fbl | CGX script, pre-processing |
| solve.inp | CCX input |
| post.fbl | CGX script, post-processing, images and plots |
| anim.fbl | CGX script, movie |
| history.gnu | Gnuplot script for the time history plot |
| profile.gnu | Gnuplot script for the profile plot |
| test.py | Python script to run the full simulation |
The model represents a rectangular plate, which is supported in the center and exposed to a transient heat flux (excitation) at the upper side.
A cross-thickness temperature and stress gradient develops and remains for the duration of the excitation time, leading to transient bending of the plate.
| Parameter | Value | Description |
|---|---|---|
th |
2 | Thickness in mm |
wi |
20 | Width in mm |
le |
100 | Wength in mm |
> cgx -b pre.fbl
The simulation domain is restricted to one quarter of the plate due to symmetry. It is meshed with 6 layers of C3D20R elements with cross thickness bias to capture the high gradients at the excitation side.
A set with a single node at the vertex of the plate is defined for history plot generation.
A node set marking a cross section path for plotting temperature and stress profiles is also defined.
The analysis is done with the *coupled temperature-displacement procedure using
fixed time increments. During the excitation (approx. half of the total time), the convergence
is slightly slower than afterwards.
> ccx solve
> monitor.py solve
Create a time history animation of the deformed shape colored by the temperature:
> cgx -b anim.fbl
> cgx -b post.fbl
creates the images used in the introduction above:
- a time history plot of the excitation intensity and the deflection of the plate tip
- a cross section temperature and stress profile plot
- Images of initial and final state and of the state at the end of the excitation.