![64_screen_shot_2016-11-09_at_11.39.18_pm.jpg](http://sharing.mywordsolution.com/CMSImages/64_screen_shot_2016-11-09_at_11.39.18_pm.jpg)
(1) A514 steel:
Est = 29x106 psi
σyst=100 ksi
ρst= 0.284 lb/in3
(2) 6061-T6 Aluminum:
Eat= 10 x 106psi
σyat = 37ksi
ρat= 0.098 lb/in3
a) Design thc thickness, t, of thc plate to prevent yielding for each of the two choices of material if a hole is not present.
b) Design the thickness of the plate for cach of the two choices of material if a holc is present. Use the criteria that the von Mises stress must be less than σyp/2. Assume the infinite width plate analysis.
c) Would the plate with a hole at the minimum thickness be lighter if it was made of aluminum or steel?