Problem $1$

A$)$ Crack length versus cycles data are given in table below from a test on a center$-$cracked plate of $7075-$T$6$ aluminum. The specimen had the following dimensions: $h=445,b=152\mathrm{.}4,t=2\mathrm{.}29mm$ The load was cycled between zero and a maximum value of $P_{\text{m}\text{a}\text{x}}=48\mathrm{.}1KN.$ Obtain $d\frac{a}{d}N$ and $K$ values corresponding to these data points.

$\backslash$table$[[$No$.,a,mm,N,x1000,d\frac{a}{d}N,K(MP{a}^{**}{m}^{0\mathrm{.}5})$