Week 1 Stress Concentration on a Plate with hole
AIM: To Design a plate with a hole(s) and determine the best case out of the two.
PROCEDURE:
CASE 1: plate with a single hole
. Select static structural ,drop it into the project schematic.
. In the engineering data, select the material static structural (default).
. Open spaceclaim geometry and draw the model as given in the problem(300*120 with 30mm thickness and a hole of 60mm at centre) then close it and update.
. Open Model then first do the meshing of 5mm (tetrahedron under sizing).
. Apply a fixed support at one end and then apply a force of 500N at other oppsite end (x-axis).
. Then under solution select Maximun Deformation and equivalent stress as required in the problem.
CASE 2:
.Select static structural ,drop it into the project schematic.
. In the engineering data, select the material static structural (default).
. Open spaceclaim geometry and draw the model as given in the problem(300*120 with 30mm thickness and a hole of 60mm at centre and 2 side hole of 30mm dia with a distance of 90mm from the centre of the first 60mm circle) then close it and update.
. Open Model then first do the meshing of 5mm (tetrahedron under sizing).
. Apply a fixed support at one end and then apply a force of 500N at other oppsite end (x-axis).
. Then under solution select Maximun Deformation and equivalent stress as required in the problem.
QUESTIONS
1)Compare the deformation and maximum stress developed on a structural steel model for the 2 cases.
ans ).
CASE HOLES MESH TOTAL DEFORMATION(max) EQUIVALENT STRESS(VON-MISES)(max)
(mm) (mm) (mpa)
1 1 5 2.7492e-004 0.59957
2 3 5 2.9699e-004 0.58495
2) From an analysis standpoint, which of the design will you select? Explain why?
ans)
from anslysis point of view, i will choose the design with single hole because the stress concdntration will be less then that in the case of plate with 3 holes.
3) From a manufacturing standpoint, which of the design will you select? Explain why?
ans)
from the manufacturing prospective , i will choose the plate with 1 hole because it will be more costlier to drill 3 holes also the plate with 3 holes require more time, more accuracy etc.