Week 1 Stress Concentration on a Plate with hole

Aim: To design a plate with a hole and determine the maximum deformation and stress developed in the model using Ansys Workbench.

Software used: Ansys Workbench 2020 R2

1. Plate with a hole:

• Designed a plate with a hole in SpaceClaim and used material as Structural steel.

Mesh:

• Created a mesh for the model as follows.

• After creating a mesh, the boundary conditions were defined as fixed at the left side and applied 500 N load on the right side.
• In the solution selected Total deformation and Equivalent stress.

Results:

Total deformation:

• Maximum deformation is 0.00027493 mm

Equivalent stress:

• Maximum stress developed on the plate is 0.59453 Mpa

2. Plate with three holes:

• Designed a plate with three holes in SpaceClaim and used material as Structural steel.

Mesh:

• Created a mesh for the model as follows.

• After creating a mesh, the boundary conditions were defined as fixed at the left side and applied 500 N load on the right side.
• In the solution selected Total deformation and Equivalent stress.

Results:

Total deformation:

• Maximum deformation is 0.0002973 mm

Equivalent stress:

• Maximum stress developed on the plate is 0.57291 Mpa

Comparison:

	Maximum deformation (mm)	Maximum stress developed (MPa)
Plate with a hole	0.00027493 mm	0.0002973 mm
Plate with three holes	0.59453 MPa	0.57291 MPa

• From the comparison on both the cases the maximum deformation developed is in the plate with three holes, but the value difference is very small.

Conclusion:

• The yield stress of structural steel is 250 MPa. As we see there is a very big difference. I would like to suggest choose the first case as the deformation is less compared to the second case for 500 N load.