Page 173 - Finite Element Modeling and Simulations with ANSYS Workbench

158 Finite Element Modeling and Simulation with ANSYS Workbench

p

p p
0.8 m The external pressure:
2.4 m p = 1MPa.

1.2 m
Boundary condition:
The tunnel is fixed on
the bottom.
0.4 m 1.6 m 0.4 m

4.9 Using ANSYS Workbench, design a steel shelf bracket. Some dimensions of the
bracket are fixed as shown in the figure. The three holes have the same diam-
eter, which can be changed in increment of 0.2 cm in the design. The goal is
using as less material as possible for the bracket, while supporting the given
distributed load p.
a. For steel, use E = 200 GPa, ν = 0.3, and yield stress σ = 250 MPa.
Y
b. Use a factor of safety = 2.5 for the design.
c. Report the configuration and dimensions of the bracket of your final design.

p = 250 N/cm 2

2 cm 2 cm
+ +
H = 12 cm 2 cm Fillet radius: 5 cm

2 cm
Bracket thickness:
t = 0.2 cm

L = 20 cm

4.10 Similar to the previous problem, design a steel bracket. Some dimensions of
the bracket are fixed as shown in the figure, while others can be changed.
The shape and topology of the bracket can also be changed. The goal of this
design is using least material for the bracket, while supporting the given
loads.