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Residual stresses can also be calculated the same way as the stresses due to the external loads is calculated.(a) True(b) FalseI got this question during an interview.This is a very interesting question from Residual Stress topic in chapter Cooling and Solidification of Casting-Forming-Welding I

Answer»

The CORRECT choice is (b) False

The best I can explain: Residual stresses have the same role in a component’s strength as common MECHANICAL stresses. HOWEVER, the stresses due to external loads can be calculated with accuracy, but residual stresses are difficult to calculate. Therefore, it is very NECESSARY to have a reliable method able to measure them with minimum damage to the surface of the casting.



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