Homework

Chapter $5$

$1-$ A ductile hot$-$rolled steel bar has a minimum yield strength in tension and compression of $350$ MPa $.$ Using the distortion$-$energy and maximum$-$shearstress theories determine the factors of safety for the following plane stress states:

$($a$){}_x=100$MPa,${}_y=100$MPa

$($b$){}_x=100$MPa,${}_y=20$MPa,${}_{xy}=-20$MPa