Week 1 Stress Concentration on a Plate with hole

AIM: To calculate Stress Concentration on a Plate with hole

PROCEDURE:

• First open the ANSYS workbench and select the Statcic Structural system to perfrom the analysis.

• Plate dimensions:

  Length=300mm
  Height=120mm
  Thickness=30mm
  Diameter=60mm

• Boundary Condition:
  
  Plate fixed at left face.
  Load of 500N on the right face.

CASE 1 : Design a plate with a hole model, but with increased thickness. Determine the maximum deformation and stress developed in the model.

• Plate With hole:

• Meshing:

• 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

CASE 2: Design a plate with three hole model, but with increased thickness. Determine the maximum deformation and stress developed in the model.

• Plate with three holes: (Dimensions are given)

• Meshing:

• Mesh is created , Now we will fixed the one surface and apply the force to the other surface.
• The force is to be applies is 500N
• And select the results as Total deformation and stress.

Results:

Total deformation:

• Maximum deformation is 0.0002973 mm

Equivalent stress:

• Maximum stress developed on the plate is 0.57291 Mpa

Comparison:

TYPE:	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

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.