Home / Examples / Stress Analysis [Galileo] / Example 43: Frictional Contact (#1)
A block moving on a plate while pressed is analyzed. The contact is with friction.
The deformation due to the friction can be observed.
Unless specified in the list below, the default conditions will be applied.
Results will vary depending on Femtet version and the PC environment.
Item |
Settings |
Analysis Space |
3D |
Model Unit |
mm |
Item |
Settings |
Solver |
Stress Analysis [Galileo] |
Analysis Type |
Static Analysis |
A polyethylene block is pressed onto a copper plate whose bottom face is fixed.
The contact face is set with [Simple Contact] boundary condition.
Body Number/Type |
Body Attribute Name |
Material Name |
0/Solid Body |
Plate |
008_Cu |
1/Solid Body |
Block |
000_Polyethylene(PE) |
The material properties are based on the material DB.
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
Fix/Face |
Mechanical |
Displacement |
Select all X/Y/Z components. UX=0, UY=0, UZ=0 |
Move/Face |
Mechanical |
Displacement |
Select all X/Y/Z components. UX=0.2x10-3 UY=0.0 UZ=0.05x10-3 |
Contact/Face |
Mechanical |
Simple Contact |
Simple Contact Classification : Automatic Setting Coefficient of Friction : 0.4 |
The Z-direction displacement is shown below by contour. The color gradation contour indicates the X displacement.
The lower part of Block is dragged to the negative X direction.
Vectors of the principal stress are shown below.
The minimum principal stress is inclined towards the friction direction.
The figure below is when the friction is nil.
The minimum principal stress is not inclined because there is no friction.
The dragging in the -X direction is not observed either.
The result table of the contact force and contacting faces at the friction coefficient of 0.4 is shown below.
As for the contact force, the friction component (X component) is generated in addition to the normal component (Z component).
The block is pressed onto the plate. As a result, the contacting area is slightly increased from 9e-6 [m2] by deformation.