Week 1 Stress Concentration on a Plate with hole

Ans. Q.1)

Case:1 The results which got from structural analysis carried out in Ansys Work Bench are below:

Max. Von Mises stress : 0.60401 Mpa

Considering the Material as a Structutral steel, the out put stress result is very much lower than the material Maximum Yield Stree value. So, we can say that the design is safe.

Max Deformation: 0.00027495 mm

The maximum deformation value is very much low and it is in micron level (0.2 micron). So, it can get back it's original shape with in few time period and does not any permanent deformation or plastic deformation.

Case:2 The results which got from structural analysis carried out in Ansys Work Bench are below:

Max. Von Mises stress : 0.58018 Mpa

Considering the Material as a Structutral steel, the out put stress result is very much lower than the material Maximum Yield Stree value. So, we can say that the design is safe.

Max Deformation: 0.00029733 mm

The maximum deformation value is very much low and it is in micron level (0.2 micron). So, it can get back it's original shape with in few time period and does not any permanent deformation or plastic deformation.

So, if we want to compare both design according to the result got from Structural analysis carried out in Ansys Work Bench that both design are safe interms of Max. Stress and Max. Deformation value.

In both cases deformation value is same is 0.2 micron and stress value is almost same. The slight difference in Stress value in both the design is negligible and can be considered as almosttt same.

Ans. Q.2)

From, the Analysis stand of point, I can select the first design.

The reason behind of selecting first design is that, we know the more no. of holes in acertain size of a gemetry, makes it more stress concentrated model which leads to failure of the part in future and makes the part weaker. So, in the first model only having one circular cut rather than three circular cut of different size in model-2, which makes it more safer design it terms of fatigue failure of the model.

Ans. Q.3)

From the manufacturing stand of view, I can select Design-1.

The reason behind of selecting design -1 instead of design-2 is only because of no. of holes.

To make cut or manufacturing cost of one hole is obviously less than the manufacturing cost of cutting three holes.

So, the manufacturing cost and time are less of Design-1 as compared to Design-2.