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I have a question.Suppose there is a cube of side 1m .It is heated by 1°C. The cube is not restrained in any direction. We are required to find out the volumetric strain.

I am getting it as 3α.

But my question is that since the cube is not restrained , ∴ there should be no stresses in any direction.

∴ ε_{v}=(σ_{x}+σ_{y}+σ_{z})(1-2μ)/E

which gives ε_{v}=0.

plz help..

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# Temperature stresses

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