Solve this multiple-choice question and choose the correct option.

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Bending stresses in a rectangular beam under transverse loading When a rectangular beam is transversely loaded producing sagging (positive) bending moments, where is the maximum compressive stress developed? Choose the correct location.

Difficulty: Easy

top layer
bottom layer
neutral axis
every cross-section equally

Correct Answer: top layer

Explanation:

ConceptFor sagging (positive) bending moments in a prismatic beam, the top fibers are in compression and the bottom fibers in tension; stress varies linearly from maximum compression at the extreme top to maximum tension at the extreme bottom.

ThereforeThe maximum compressive stress occurs at the top layer.

Final Answertop layer

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