$\delta = \delta_T + \delta_{st}$

$\dfrac{\sigma \, L}{E} = \alpha \, L \, (\Delta T) + \dfrac{PL}{AE}$

$\sigma = \alpha \, E \, (\Delta T) + \dfrac{P}{A}$

$130 = (11.7 \times 10^{-6})(200\,000)(40) + \dfrac{5000}{A}$

$A = \dfrac{5000}{36.4} = 137.36 \, \text{ mm}^2$

$\frac{1}{4} \pi d^2 = 137.36$

$d = 13.22 \, \text{ mm}$ *answer*

## Comments

## Positive po si thermal stress

Positive po si thermal stress. Ibig sabihin po initial temperature niya ay -20°C? Medyo naguluhan lang po ako dyan.

## I think it was established na

I think it was established na po sa compatibility equation. Since yung thermal deformation po is to the left, and tensile deformation is to the right, therefore yung total deformation po is sum of the two.