Q$5$: A thin sheet with hole as shown in in figure below, the diameter of hole is $(D=20mm),$ a stress$-$strain curve of the sheet is define by $\frac{?}{\text{b}\text{a}\text{r}}()=330(\frac{?}{\text{b}\text{a}\text{r}}(){)}^{0\mathrm{.}26}.$ If the applied stresses & ${}_2=80$MPa $).$

Determine The effective strain $(\frac{?}{\text{b}\text{a}\text{r}}()).$

The circular hole is become ellipse after deformation. Determine the major and minor radius of ellipse $(A$&$B)$ if ${}_2=2{}_3.$Q$5$: A thin sheet with hole as shown in in figure below, the diameter of hole is $(D=20mm),$ a stress$-$strain curve of the sheet is define by $\frac{?}{\text{b}\text{a}\text{r}}()=330(\frac{?}{\text{b}\text{a}\text{r}}(){)}^{0\mathrm{.}26}.$ If the applied stresses & ${}_2=80$MPa $).$

Determine The effective strain $(\frac{?}{\text{b}\text{a}\text{r}}()).$

The circular hole is become ellipse after deformation. Determine the major and minor radius of ellipse $(A$&$B)$ if ${}_2=2{}_3.$