Area thermal expansion coefficient
Thermal expansion is the tendency of matter to change in length, area or volume in response to a change in temperature, through heat transfer.
The degree of expansion divided by the change in temperature is called the material’s coefficient of thermal expansion and generally varies with temperature.
The area thermal expansion coefficient relates the change in a material’s area dimensions to a change in temperature. It is the fractional change in area per degree of temperature change (ignoring pressure).
|Area thermal expansion coefficient (1/K)
|Area of interest on the object (m2)
|Change in area (m2)
|Change of temperature (K)