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Choose the INCORRECT conditions for the thermal stress in a body.

Choose the INCORRECT conditions for the thermal stress in a body. Correct Answer It is the function of modulus of rigidity.

Ordinary materials expand when heated and contract when cooled, hence, an increase in temperature produces a positive thermal strain.

Change in Length, δL = α L ΔT

Strain = δL /L = αLΔT/L = αΔT

Stress =  strain x E = α.ΔT.E

Where α = coefficient of linear expansion for the material,  L = original Length, ΔT = temp. change

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