A $5-$mm$-$thick rectangular alloy bar is subjected to a tensile load $P$ by pins at A and $B,$ as

shown in the figure. The width of the bar is $w=35mm.$ Strain gages bonded to the specimen

measure the following strains in the longitudinal $(x)$ and transverse $(y)$ directions: ${}_x=830$

and ${}_y=-260.$

$($a$)$ Determine Poisson's ratio for this specimen.

$($b$)$ If the measured strains were produced by an axial load of $P=22kN,$ what is the modulus

of elasticity for this specimen?

Answers:

$($a$)v=$

$($b$)E=$

GPa