Civil Engineering MCQAE Level Civil Engineering
Principal stresses are +80 and −40 N/mm². Normal and shear stresses on a plane at 45° to the major principal plane:
Strength of MaterialsStresses on Inclined PlaneMEDIUM
Choose the correct answer
A
σ=20, τ=60
B
σ=40, τ=60
C
σ=20, τ=0
D
σ=0, τ=60
Correct Answer
A. σ=20, τ=60
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σ=(σ₁+σ₂)/2=(80−40)/2=20; τ=(σ₁−σ₂)/2=(80+40)/2=60 N/mm²
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