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.
Mechanical Engineering
Strength of Materials
Difficulty: Easy
Choose an option
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Atop layer
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Bbottom layer
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Cneutral axis
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Devery cross-section equally
Answer
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