A prismatic bar

AB

of length

378mm

is held between immovable supports. The temperature of the bar is raised uniformly by an amount 31. Assume the bar is made of steel

E=200GPa;a=11.7\\\\times (10^(-6))/(C)

.\ What is the thermal stress developed in the bar?

A prismatic bar AB of length 378mm is held between immovable supports. The temperature of the bar is raised uniformly by an amount 31. Assume the bar is made of steel [E=200GPa;a=11.7106/C ]. What is the thermal stress developed in the bar