Civil Engineering MCQAE Level Civil Engineering
If a compound bar is FREE (not constrained) to expand when heated:
Strength of MaterialsFree vs Constrained Thermal ExpansionEASY
Choose the correct answer
A
Large tensile stresses develop
B
Large compressive stresses develop
C
No thermal stress develops
D
Stresses depend on material properties
Correct Answer
C. No thermal stress develops
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Thermal stress occurs ONLY when deformation is restrained. Free expansion → zero stress.
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