Home / Examples / Stress Analysis [Galileo] / Example 19: Two Plates Adhered at Both Ends (Simple Contact #1)

Example 19: Two Plates Adhered at One End (Simple Contact #1)

General

• The model is a bimetal stacked with plate materials having different coefficients of linear thermal expansion.
  Both ends are fixed and the simple contact boundary condition is set to the boundaries other than the ends.
  The bar is subjected to the thermal load caused by temperature variation.
   

• The deformation, the displacement distribution, and the stress distribution are solved.
   

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

• Obtain this session's project file. (Right-click and choose 'Save link as')




• Results will vary depending on Femtet version and the PC environment.

 

Analysis Space

Item	Settings
Analysis Space	3D
Model Unit	mm

 

Analysis Conditions

The temperature is applied evenly on the model.

Opt for the thermal load in the analysis condition, and set the reference temperature and the reached temperature.

There is no need to couple with the thermal analysis [Watt].

Item	Settings
Solver	Stress Analysis [Galileo]
Analysis Type	Static Analysis
Options	Select Thermal load

 

The Step/Thermal Load tab is set as follows.

Tab	Setting Item	Settings
Step/Thermal Load	Reference Temperature	25 [deg]
	Step/Reached Temperature Setting	Step 1: 50 [deg]

Model

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
0/Solid	TERMINAL	MAT3
1/Solid	PLATE1	MAT1
2/Solid	PLATE2	MAT2
3/Solid	TERMINAL	MAT3

 

The material properties are set up as follows:

MAT2 has a much higher coefficient of linear thermal expansion than MAT1.

Material Name	Tab	Properties
MAT1	Elasticity	Young's Modulus: 10×109 [Pa] Poisson's Ratio: 0.3
	Coefficient of Linear Thermal Expansion	5×10-6 [1/deg]
MAT2	Elasticity	Young's Modulus: 10×109 [Pa] Poisson's Ratio: 0.3
	Coefficient of Linear Thermal Expansion	10×10-6 [1/deg]
MAT3	Elasticity	Young's modulus: 10×109 [Pa] Poisson's Ratio: 0.3
	Coefficient of Linear Thermal Expansion	0×10-6 [1/deg]

Boundary Condition

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
CONTACT/Face	Mechanical	Simple Contact	Simple Contact Classification : Automatic Judgment

Results

The contour diagram shows the magnitude of displacement.

Select [Automatic Scale] for Emphasis Type in the [Graphics Setup] dialog box.

The bi-metal is deformed by the thermal load and a gap appears between the plates.

 

The diagram below shows the side view.