PARTI 1. The maximum shear stress in a solid round shaft subjected only to torsi

Question

PARTI 1. The maximum shear stress in a solid round shaft subjected only to torsion occurs (A) on prinéipal planesM TO 2OMAHOEM (B) on planes containing the axis of the shaft (C) on the surface of the shaft (D) only on planes perpendicular to the axis of the shaft E) at the neutral axis 2. In an I-beam subjected to simple bending, the maximum bending stress occurs (A) at the neutral axis (B) in the web above the neutral axis (C) in the web below the neutral axiso (D) at the top and bottom surfaces of the beam (E) where the web joins the lower flange dT

Explanation / Answer

1) Shear stress is zero at neutral axis and on principal plane. shape of shear stress is triangular above and below the neutral axis which is maximum at surface and zero at neutral axis. Shear stress is maximum on the surface of shaft.

Hence option C is correct.

2) In an I beam subjected to simple bending, Bending stress is zero at the neutral axis and maximum at the top and bottom surfaces of the beam.

Hence, option D is correct.

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