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Bending theory: stress at the neutral axis of a beam cross-section Define the neutral axis of a beam cross-section under pure bending. Identify the bending stress value at the neutral axis.

Q: Bending theory: stress at the neutral axis of a beam cross-section Define the neutral axis of a beam cross-section under pure bending. Identify the bending stress value at the neutral axis.

Concept In pure bending: σ = (M/I)·y, where y is the distance from the neutral axis (NA).At the NA, y = 0 ⇒ σ = 0. Final Answer Zero.

Difficulty: Easy

Zero
Minimum (but not zero)
Maximum
Infinity

Correct Answer: Zero

Explanation:

Concept
In pure bending: σ = (M/I)·y, where y is the distance from the neutral axis (NA).At the NA, y = 0 ⇒ σ = 0.

Final Answer
Zero.

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