$2024-$T$4$ Aluminum:

Density $=$

$0\mathrm{.}101$

$$

lb$/$in

$3$

$0\mathrm{.}101$lb$/$in

$3$

Yield Strength $=$

$42$

$$

ksi

$42$ksi

$17-7$PH Stainless Steel:

Density $=$

$0\mathrm{.}280$

$$

lb$/$in

$3$

$0\mathrm{.}280$lb$/$in

$3$

Yield Strength $=$

$140$

$$

ksi

$140$ksi$1\mathrm{.}10$ Given: The fuel tank shown below is to be utilized as part of a large zero$-$gravity spacecraft.

Assume that the criterion for failure of the tank is either maximum normal stress

or maximum shear stress.

$S.F.=1\mathrm{.}25$

Required:

$($a$)$ Determine whether $2024-$T$4$ aluminum or stainless steel will produce a lighter structure.

$($b$)$ Redesign the tank to be spherical and contain the same volume of fuel at $200$ psi internal

pressure and determine whether the new design will produce a lighter structure than the

result in part $($a$).$

$1\mathrm{.}11$ Given: A hydraulic drive component is subjected to the combined loading shown.