Civil Engineering MCQAE Level Civil Engineering
Steel bar constrained at both ends, heated ΔT=60°C. α=12×10⁻⁶/°C, E=200 GPa. Thermal stress:
Strength of MaterialsThermal Stress Constrained BarEASY
Choose the correct answer
A
72 N/mm²
B
96 N/mm²
C
120 N/mm²
D
144 N/mm²
Correct Answer
D. 144 N/mm²
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σ=EαΔT=200,000×12×10⁻⁶×60=144 N/mm² (compressive)
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