Q$1(8+5)$

A $44\mathrm{.}5$ mm wide sheet metal blank is bent as shown in the below given Figure. The metal has a modulus of elasticity $=205$GPa, yield strength $=275$MPa, and tensile strength $=450$MPa. Other data are $K_{ba}=0\mathrm{.}33,K_{bf}=1\mathrm{.}33,$ and D $($die opening$)=2\mathrm{.}5mm.$ Determine $($a$)$ the starting blank size.

$($b$)$ If width of blank is increased by $25\%,$ how would this affect the length of starting blank?

$4\mathrm{.}5$

$50$ mPa