고체역학 (Gere) — Axially Loaded Members: Problem 2.5-7

2.5-7 An IPN 200 beam of a length 3 m is held between immoveable supports. The beam has a modulus of elasticity \(E = 200\) GPa and coefficient of thermal expansion \(\alpha = 12 \times 10^{-6}/^{\circ}\text{C}\). If the temperature of the beam is raised uniformly by an amount \(\Delta T = 10^{\circ}\text{C}\), calculate the thermal stress \(\sigma_T\) in the beam.