Week 1 Stress Concentration on a Plate with hole

Objective:- Design plate with one hole and two holes along the centre line using the boundary                         conditions like:

                                       - Plate fix at one end.

                                       - Force apply on opposite side of 500N. Then analyse the strees and                       deformation in both the conditions.

Case 1: Plate with single hole

            Plate dimensions:

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

• This model is created in space claim by uisng different tools like rectangle, circle with centre. 
• After creation of basic geometry we will extrude it as per thickness ask for. i.e. t=30mm.
• After creating geometry we will go for model so we can make mesh (0.5mm size) on given model and then insert  force, fix support also insert joint load as revolute joint.

• After addding all the conditions we will go for results whichever required in the final solution like stress, deformation. 

Case 2: Plate with centre hole along with two holes on centre line.

             smaller holes 90mm away from the center:

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

• This model is created in space claim by uisng different tools like rectangle, circle with centre. 

• After creation of basic geometry we will extrude it as per thickness ask for. i.e. t=30mm.
• After creating geometry we will go for model so we can make mesh (0.5mm size) on given model and then insert  force, fix support also insert joint load as revolute joint.

• After addding all the conditions we will go for results whichever required in the final solution like stress, deformation. 

• Comparision between the results:

Conditions	plate with a hole	plate with three holes
Total deformation (max)	0.55e-3	0.00029
Total deformation (min)	0.0003	0.00013
Total deformation (avg)	0	0
Equivalent stress (max)	1.21	0.58
Equivalent stress (min)	0.345	0.3242
Equivalent stress (avg)	2.065e-002	0.001

Conclusion:

• From the table I conclude that total deformation in Plate with three holes has more than Plate with a hole. And maximum stress is higher in plate with a hole than Plate with three holes because of more irregularities.
• But equivalent avg. stress is more in plate with three holes as streess is devloped near holes.
• From analysis point of view, Plate with three holes will preferable as max. and min. stress is less as compared to plate with a hole. Also time taken for both the conditions was approx. remains same.
• From manufacturing  point of view I will suggest Plate with single hole because it is easy to  manufacture plate with one hole compare to three hole as it takes more time also to manufacture.