EXPANSIVITY
Additionally, Linear expansivity, often referred to as thermal expansion, is a material’s
Expansivity is the increase in the length of a substance when it's temperature increases by 1k or degree celsius. Also, the unit of linear expansivity is per degree celsius (°C-¹) or per kelvin (K-¹).
Advantages and disadvantages of Linear
expansivity
tendency to change its dimensions in response to temperature variations.Linear
expansivity is also known as the coefficient of linear expansion.
The coefficient of linear expansion is the reason these metals have different rates of expansion at the same temperature.
Linear Expansivity Formula and Increase in Length(Expansion) Formula
The linear expansivity formula is: α=e/L0Δθ
But since e = extension = L – L0
Hence,
Linear Expansivity Calculations
Here are a few solved problems to help you understand how to calculate linear expansivity:
Question 1:An invar of length 50 meters increases to 50.5 meters when heated from 20°C to 70°C. Calculate its linear expansivity.
Data
Original length, L0 = 50 m
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