AATERIALS HW$.$pdf

Date : $09\mathrm{.}12\mathrm{.}2024$

Date: $09\mathrm{.}12\mathrm{.}2024$ at $12\mathrm{.}30$

STRENGTH OF MATERLALS HW$.3$

Q$\mathrm{.}1.$ A tensile test is carried out on a bar of mild steel diameter $2$ cm $.$ Yields under a load of $80$ kN $.$ It reaches a maximum load of $150$ kN $,$ breaks finally at a load of $70$ kN $.$

Estimate:

a$)$ The tensile stress at the yield pont

b$)$ The ultimate tensile stress

c$)$ The average stress at the breaking point, if the diameter of the fractured neck is $1$ cm $.$