Problem $2$

A component in the shape of a large sheet is to be fabricated from $7075-$T$651$ aluminum, which has a fracture toughness $\backslash (\backslash$mathrm$\{$Kc$\}=24\mathrm{.}2\backslash$mathrm$\{$MPa$\}-\backslash$mathrm$\{$m$\}^\{0\mathrm{.}5\}\backslash )$ and a tensile yield strength of $495$ MPa $.$ Determine the largest edge crack that could be tolerated in the sheet if the nominal stress does not exceed one half the yield strength.