Week 5 Sphere pressing on a plate

STRUCTURAL ANALYSIS FOR SPHERE PRESSING ON A PLATE

OBJECTIVE

• To perform a Static-Structural analysis to simulate a sphere pressing on a plate using ANSYS workbench.
• To use Structural steel for both sphere and plate but the material of the plate must be Structural steel Non Linear.
• To press the sphere onto plate 4mm downwards and retract it.
• To find out the plastic deformation occurring the material.

Material data

Figure. 1 shows the structural steel's properties in Ansys Workbench engineering data. It was used as the sphere body of the sphere pressing model's material input.

Figure. 1 Structural Steel Engineering Data

Figure. 2 shows the structural steel Non Linear's properties in Ansys Workbench engineering data. It was used as the wire bending model's material input expect the wire.

Figure. 2 Structural Steel Non Linear Engineering Data

Model Geomentry

Figure. 3 shows the imported given Sphere Pressing model in the mechanical modular.

Figure. 3 Sphere Pressing model

Connections

Initially the models are renamed as Sphere and Plate. Figure. 4 illustrates the contact and target faces of the Sphere Pressing model. In which the Sphere is assigned as “Contact Bodies” and the Plate is assigned as “Target Bodies” and The conncetion is assigned as Frictional contact.

 

Figure. 4 Frictional-Sphere to Plate.

Meshing

Mesh element size of 0.75 mm was applied and then meshed as shown in Figure. 5.

Figure. 5. Meshed Sphere Pressing model

Fixed joint & Displacement joint

The plate is stationary in this simulation hence the bottom face of the plate is fixed by a fixed joint as shown in Figure. 6 and the sphere is on pressing the plate in Y axis in downward direction hence the top face of the sphere is given about a displacement of 4mm in negative Y axis as shown in Figure. 7. In analysis settings the number of steps is assigned as 4, hence the first two steps is for loading and next two steps is for retracting.

Figure. 6 Fixed Joint of Sphere Pressing model

Figure. 7 Displacement Joint of Sphere Pressing model

Simulation results

Directional Deformation

Figure. 8 shows the Directional deformation of the plate with sphere in negative Y axis direction and Figure. 9 shows the Directional deformation of the plate in negative Y axis direction

Figure. 8 Directional deformation of the plate with sphere

Figure. 9 Directional deformation of the plate

Equivalent Elastic Strain

Figure. 10 shows the Equivalent Elastic Strain of the plate with sphere and Figure. 11 shows the Equivalent Elastic Strain of the plate

Figure. 10 Equivalent Elastic Strain of the plate with sphere

Figure. 11 Equivalent Elastic Strain of the plate

Figure. 12 shows the Equivalent Elastic Strain of the Sphere for all 4 number of steps (4 Seconds).

Figure. 12 Equivalent Elastic Strain of the Sphere

Equivalent Stress

Figure. 13 shows the Equivalent Stress of the plate with sphere and Figure. 14 shows the Equivalent Elastic Stress of the plate

Figure. 13 Equivalent Stress of the plate with sphere

Figure. 14 Equivalent Stress of the plate

Simulation Outcome

Plate Materials	Parameters	Maximum	Minimum
Structural steel NL	Total Deformation	0.3259 mm	-3.3139 mm
	Equivalent Stress	3845.2 MPa	23.296 MPa
	Equivalent Elastic Strain	0.01992 mm	0.00026 mm

 

Conclusion

From the above structural analysis of the sphere pressing on a plate, it is clear that sphere and plate exhibit equivalent elastic strain of 0.01992 mm and 0.00026 mm respectively.