Problem $1(4$ points$)$

Calculate the Young's module in the reading assignment $1($skis mechanics$)$ Figure $7$

longitudinal direction. Use the best estimate, you

Stress $)$

don't have to be accurate.

Problem $2(10$ points$)$

Conventional construction concrete young's

modulus is around $30,000$ Mpa, a modified bamboo

filler concrete has the compressive test as shown in

the figure on the right. Now, a $35$ Mpa load is applied

to the concrete. Determine the permanent set for this material.

Problem $3(10$ points$)$

A aluminum alloy plate is subjected to a shear force and it deforms as shown in the

figure. The shear stress and strain diagram is also available for this material. Determine

the horizontal disnlacement $($d$)$

Problem $4(10$ points$)$

The elastic region of a polymer composite

material's stress$-$strain diagram is shown in the

figure. The sample's original length $($gage length$)$

is $100mm,$ and the diameter is $20mm.$ When it is

applied $50kN,$ the diameter becomes

$20\mathrm{.}00236$mm$.$ Determine Poisson's ratio and

shear modulus of elasticity for the material.