Week 1 Stress Concentration on a Plate with hole

Aim :

The aim is to design and analyse the given file.

Objective:

Case :1

Design a plate with a hole model similar to what we worked in the class, but with increased thickness.
Determine the maximum deformation and stress developed in the model.

Plate dimensions:

Length=300mm
Height=120mm
Thickness=30mm
Circular Hole at the center:
Diameter=60mm

Case 2:

smaller holes 90mm away from the center:

Diameter=30mm
Boundary Conditions:
Plate fixed at left face.
Load of 500N on the right face.

Procedure:

First open the ansys workbench, then choose the static structural.

step-1: Material assignment

• Open the engineering material and select the required material

• Structural steel is a default material

step 2: geometry

• Open the spaceclaim from the static structural.

• Creade the 2D geomatry using spaceclaim.

• After finishing geomatry select pull option assign the thickness.

step-3: Mesh

• Select the mesh in the window

• Mesh --> Generate mesh .

• Elemet size is the 6mm .

step-4: Bountry condition

Static structural --> right click, inset -->fixed supportchoose the left side, now the left side is the fixed

Static structural --> right click, inset -->force choose the right side, 500N act on the right side

Finally extract the solution.

Result :

Thus the given model has been created and analayzed.

Conclusion:

From a manufacturing standpoint case 1 is perferable as the making of additional two holes requires additional operations to be performed which requires additional times.

From a analysis standpoint case 2 is preferable since max stress and strain are less compared to case 1 for the same loading condition. This casused by additional holes that act as a stress relliver in this model, so it can be subjected to more load if required. which gives the possibility of reducing material cost and lighter object.