Question

PHYS 2425 Group Problem 13 A red-hot steel rivet is driven into a girder that is at 20.000°C. The initial length of the rivet is 3.2035 cm, and it starts at 525.323 c This particular steel has a coefficient of thermal expansion of 12.307 x 10-6 IAC. As it shrinks. it will compress the steel of the girder, but it will still be under tension. If the Young's Modulus of this steel is 2.0183 x 101 N/m, and its final length is exactly halfway between its initial length and the length it would have if it cooled down in isolation, how much stress will it be under, in N/m2? (Note: you will have two different Lo values here! One for the thermal strain, one for the tensile strain.)

Answer 1

nttol Legth, o 3.2035 Cm lpこ20.000°c L4 2015 C-513 32 down But dve to stvess fts length fo State 2 Lf = 3.1935 Cm-) ful Length vnder êtres Young rtod le *Noww y AL e. stress

2 0183 x ox 00099 3 L8 36 NIm2 stress