Problem $2$:

a$.$ Identify all the marked points on the material curves by the terms listed below. Compute an approximate

numerical value for each term from the graph and write it next to the point.

E $($Young$\text{'}$s Modulus$)$

Sy $($Yield Strength$)$

$S_u($Ultimate Strength$)$

$0\mathrm{.}2\%$ Offset

Proportional Limit

Elastic Limit

b$.$ Identify each stress$-$strain graph as one for Steel or Aluminium