This thermal expansion coeff. calculator is used to find the change in material's area(A), volume(V) and length(L) dimensions to change in temperature(T).
Thermal Expansion :
Thermal expansion is the tendency of matter to change its shape, area, and volume in response to a change in temperature.
Area Thermal Expansion Coefficient Formula :
The area thermal expansion coefficient relates the change in a materials area dimensions to a change in temperature. It is the fractional change in area per degree of temperature change. Ignoring pressure, we may write:
αA = 1 A ΔA ΔT
Where,
αA - area thermal expansion coefficient
A - area of the objects in m2
ΔA - change in area in m2
ΔT - change in temperature in kelvin
ΔA / ΔT - is the rate of change of that area per unit change in temperature.
Volume Thermal Expansion Coefficient Formula :
For a solid, we can ignore the effects of pressure on the material, and the volumetric thermal expansion coefficient can be written.
αV = 1 V ΔV ΔT
Where,
αV - volume thermal expansion coefficient
V - volume of the objects in m3
ΔV - change in volume in m3
ΔT - change in temperature in kelvin
ΔV / ΔT - is the rate of change of that volume with temperature.
Linear Thermal Expansion Coefficient Formula :
Linear expansion means change in one dimension (length) as opposed to change in volume (volumetric expansion).It is the fractional change in length per degree of temperature change. Assuming negligible effect of pressure, we may write:
ΔL = αL L ΔT
Where,
ΔL - change of length in m
αL - linear expansion coefficient in K
L - length measurement referencer in m
ΔT - change of temperature in K
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