Week 1 Stress Concentration on a Plate with hole

STRESS CONCENTRATION ON PLATE WITH HOLE IN ANSYS WORKBENCH

OBJECTIVES

Design a plate with one hole, three holes and find the deformation and equivalent stress of the plate.

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.

CASE1: Plate with one hole

Plate dimensions:

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

The above model is created in space claim and the material is selected as structural steel.

MESH

Mesh the model with the element size 7.5 and it is a tetragonal shape mesh.

TOTAL DEFORMATION

one side of the plate is fixed and other side is given load of 500N.

The max deformation will be 2.6506e-4 mm

EQUIVALENT STRESS

The max stress developed at the center hole is 0.57346 MPa

CASE2: Plate with three holes

Model

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

Small holes 90mm away from the centre with dia 30mm.

The above model is created in space claim and the material is selected as structural steel.

MESH

Mesh the model with the element size 7.5 and it is a tetragonal shape mesh.

TOTAL DEFORMATION

one side of the plate is fixed and other side is given load of 500N.

The max deformation will be 2.9715e-4 mm

EQUIVALENT STRESS

The max stress developed at the center hole is 0.5702 MPa

RESULT AND CONCLUSION

	Plate with one hole	Plate with two hole
Max deformation	2.6506e-4 mm	2.9715e-4 mm
Min deformation	0	0
Max equivalent stress	0.57346 MPa	0.5702 MPa
Min equivalent stress	0	0

The plate with three holes has more deformation than the plate with one hole and the max stress developed at plate with one hole

than the plate with three holes..

In the analysis standpoint i will choose plate with two hole because the stress developed at the center hole is less than the other,

because the applied force is somewhat absorbed by the two small holes.

In the manufacture stand point i will choose plate with one hole because process time,man engagement time and manufacturing cost is less than the

plate with three holes.

https://drive.google.com/file/d/1_HQEIxOCR6jSmhCyijTCdYhRBbZO2cdr/view?usp=sharing