Challenge

Week 1 Stress Concentration on a Plate with hole

OBJECTIVE:

Steps Followed:

Case 1:

Open the ANSYS workbench, select the analysis system as "Static Structural "
New project will be created , rename it to convinience
From project schematic we can select Engineering Data, this is the place where we can find the materials to the model
In this case we did not ask to keep any particular material, so default structural steel material is imported
Next is to create geometry,Right click on the geometry to create the model in space claim
This option will take you to space claim, there we can create desired geometry
Create the geometry with the mentioned dimension
After creating the sketch exit from the sketch option and use pull option to give the thickness to the sketch
Next step is to set up the model, before opening the mechanical workbench, right click the model and update it
In this workbench we can assign the materials that we have imported in engineering data
Mesh the model with required element size , mesh with tetrahedron element
Next we have to set the boundary conditions,fix the left face and add froce(Tensile) of 500N on the other end
Afetr setting up the boundary condition we can solve the problem, StaticStructural>right click>solve
We have to extract the solution, right click on Solution>Insert>deformation, stress
Repeat the same steps for model 2, the only change will the geometry creation
Extra two holes of 30mm dia will be included on the each side with a distance of 90mm each from centre of the big hole

RESULTS:

Case1:

Case 2:

CONCLUSION:

From the above results we can see the maximum deformation is in the second model
Maximum stress is more in the second model
By keeping this in mind we can conclude model 1 is best choice from an analysis standpoint
There is good result for Model 1(Plate with single hole), and it is easy to manufacture also
Machining process like facing , drilling has to be done on both the models
But there is only one hole in Case 1, so Model 1 will again be the best choice in manufacturing standpoint
If weight reduction in the model plays a mojor role then due to three holes in model 2, the weight of the model gets reduced
In such Case Model 2 can selected

Ship work like this
in your own course.