Stress on a plate with hole

stress concentration on a plate with hole

case1:

static structural analysis is being carried out on aplate with single hole of diameter 60mm.The material used is structural steel and stainless steel and the analysis is carried out in ansys work bench.The plate is being modelled in ansys space claim

The 2d dimensions of the p-late are

Length:300mm

breadth:120mm

thickness:30mm

The properties of material are stated below:

Density:7850kgm^3

Tensile yield strength:2.5E+0.8Pa

Compressive yield strength:2.5E+0.8Pa

Tensile Ultimate Strength:4.6E+0.8Pa

The model is meshed using ansys mesher with an element size of 2mm and path confirming method using tetrahedrons are employed.This is done to get the best refinement

A mesh metric that identifies elements according to their quality WAS EMPLOYED and it can been seen that the elements with lowest quality are minimal.

Case2:

static sdtructural analysis is carried out on a plaste with 3 holes.same as that of case 1with extra 2 holes of 30mm diameter 90mm apart from centre. and the materials are same as that of case1.

the mesh is done usingpath confirming method and using tetrahedrons asd that of case1.

a mesh metric that identifies elements according to their quality was employed as in case 1.

A fixed loaqd is applied on oner side of the model. and on the other side a load

of 500N is APPLIED.Then the simulation is doned to obtain results.

RESULTS:

The total deformationin case 1 and case 2 is shown in the fig below:

The maximum principal stress in case 1 and case 2 are shown below:

CONCLUSION:

The analysis was done successfully.

On comparision of the total deformation in both the cases the average value is 0.08 and in case of maximum value the difference is 0.2236.

On comparision of maximum principal stress in both cases the average value is 0.001 and in case of maximum value the difference is 0.02569.

In manufacturing point of view case 1 is being choosen for its less work.