DoITPoMS

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Results: Measuring the thermal expansivity of polycarbonate

For the aluminium-polycarbonate bi-material strip the following measurements were made

δ = 0.04 m
x = 0.189 m

From equation (3) the curvature

Equation

From equation (6), the misfit strain

Equation

And so, from equation (5)

Equation

So the thermal expansivity of the polycarbonate material is 4.5 x 10-5 K-1.


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