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# Example4Deformation due to the Temperature Gradient #4 – Transient Analysis

General

• A bimetal consisting of two different metal plates is analyzed.
It deforms under the thermal load. The transient analysis visualizes the deformation.

• The deformation, the distributions of the displacement and the mechanical stress over the time are solved.

• Unless specified in the list below, the default conditions will be applied.

### Analysis Space

 Item Settings Analysis Space 3D Model unit mm

### Analysis Conditions

Select Thermal analysis and Mechanical stress analysis.

 Item Settings Solvers Thermal analysis [Watt] Mechanical stress analysis [Galileo] Thermal-Analysis Type Transient analysis Options N/A *

* “Thermal Load” is selected by default for the thermal load-mechanical stress coupled analysis.

The Step/Thermal Load tab is set as follows.

 Tab Setting Item Settings Step/Thermal Load * Reference temperature 25[deg]

* The reached temperatures come from the thermal analysis.

* Thermal coupled steps are set up on the transient analysis tab.

The transient analysis is set up in transient tab as follows.

Tab

Setting Item

Settings

Transient analysis

Table

 Number Calculation steps Output steps Time step [s] 1 10 1 0.1

Initial Temperature

25[deg]

### Model

Two flat solid bodies are created to form metal plates. One is copper and the other is tungsten. Their coefficients of expansion are different.

As it deforms itself, there is no need to set up the boundary conditions to constrain.
The “”temperature” boundary conditions are set on both ends of the plates.

### Body Attributes and Materials

 Body Number/Type Body Attribute Name Material Name 0/Solid CU_PLATE 008_Cu * 1/Solid W_PLATE 005_W

* Available from the Material DB

### Boundary Conditions

Thermal analysis is performed based on the boundary conditions below. The resulting temperature distribution is forwarded to mechanical stress analysis.

 Boundary Condition Name/Topology Tab Boundary Condition Type Settings TEMP1/Face Thermal Temperature -10[deg] TEMP2/Face Thermal Temperature 60[deg]

### Results

The temperature distributions as a result of Watt are shown below.

In 0.2 seconds:

In 1.0 seconds:

The temperature gradient gets converged as the time passes.

The deformations as a result of Galileo are shown below. The color indicates the Z displacement.

In 0.2 seconds:

In 1.0 seconds:

The bimetal deforms greater with the temperature gradient converged.

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