femap project
TRANSCRIPT
FEMAP Project
By
Muhammad Ziaur Rahman
1 Identification of Load Position for Maximum von Mises Stress (mesh size=default)
1.1 Load is applied at bottom
According to the above figure-
Amount of maximum von Mises stress
Stress Position
7282
Inner bottom surface of the bracket
1.2 Load is applied at middle
According to the above figure-
Amount of maximum von Mises stress
Stress Position
13501
Inner bottom surface of the bracket
1.3 Load is applied at top
According to the above figure-
Amount of maximum von Mises stress
Stress Position
15520
Inner top and bottom surface of the bracket
Also at the fillet
So maximum von Mises stress generates when load is applied at the top pin position
2 Demonstration of the Position of Peak von Mises Stresses for Different Load Position
Load is applied at bottom pin, mid pin and top pin position respectively
3 Mesh Convergence Study: Mesh Size vs. Peak von Mises Stress
Mesh
Size
Peak von Mises Stress
0.127 16506
0.1 16659
0.08 16574
0.06 16945
0.04 17471
0.03 17701
With the decrease of mesh size peak von Mises stress increases and it starts to saturate at around the mesh
size of 0.03. So 0.03 is the mesh size we are going to use to design our problem
So maximum value of peak von Mises stress is 17701 psi which is found for a mesh size
of 0.03
4 Factor of Safety Study
Δ t2=0, Δt1=0.01
When t1 is increased for 0.01 inch and t2 is kept unchanged, peak von Mises stress is found to
be 16610 psi
Factor of safety, η= yield stress/peak von Mises stress=2.107
Deformed front view and isometric view of the final design with a factor of safety=2.107 are given in the
next page.
Final Result
Thickness changes are : Δt1=0.01
Δ t2=0.0
Factor of Safety η= 2.107
FINAL DESIGN : FRONT VIEW
FINAL DESIGN : ISOMETRIC VIEW