It is important to consider the effect of thermal expansion when building a structure that must withstand changes in temperature. For example, a metal beam will expand in hot temperatures. The additional stress could cause the structure to fail. Similarly, a material will contract in cold temperatures. The linear change in length of a material if it is allowed to freely expand is described by the following equation:
L Δ=α L 0 T Δ
Here, L0 is the initial length of the material in meters, LΔ is the displacement in meters, TΔ is the change in temperature in Celsius, and a is a coefficient for linear expansion.
Write a
Aluminum | 2.31 × 10–5 |
Copper | 1.70 × 10–5 |
Glass | 8.50 × 10–6 |
Steel | 1.20 × 10–5 |
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