Question $1(200$ marks$)$

Find the following

a$)$ Stress$-$Strain Curve

b$)$ Young's modulus or modulus of elasticity or rigidity or elastic modulus

c$)$ Ductility or percentage elongation $(\%)($See Table $1$ mentioned below$)$

d$)$ Toughness $($MPa$)$

e$)$ Yield Strength $($MPa$)$

f$)$ Yield point

g$)$ Tensile Strength $($MPa$)$

h$)$ Resilience

FOR

Stainless steel

Mild steel

Copper

Nylon

Aluminum

Required materials:

$1=0\mathrm{.}00689476$

Stress $(MPa)=$ Stress $({)}^{**}0\mathrm{.}00689476$

Strain $=$ Strain $\frac{\%}{100}$

Young's modulus $=$ Slope of stress$-$strain curve only in the elastic region

Table $1$: Gage length analysis after tensile testing

$\backslash$table$[[$Material$,$Initial gage length $($Inch$),$Final gage length $($Inch$)],[$Stainless steel,$1\mathrm{.}98,2\mathrm{.}785],[$Copper$,1\mathrm{.}98,2\mathrm{.}5],[$Nylon$,1\mathrm{.}98,2\mathrm{.}5025],[$Mild steel,$1\mathrm{.}98,2\mathrm{.}6965],[$Aluminum$,1\mathrm{.}98,2\mathrm{.}3]]$