A closed thin-walled tube has thickness, ๐‘ก, mean enclosed area within the boundary of the centerline of tubeโ€™s thickness, ๐ด๐‘š, and shear stress, ๐œ. Torsional moment of resistance

Q. A closed thin-walled tube has thickness, ๐‘ก, mean enclosed area within the boundary of the centerline of tubeโ€™s thickness, ๐ด๐‘š, and shear stress, ๐œ. Torsional moment of resistance, T, of the section would be

(A) 0.5๐œ๐ด๐‘š๐‘ก

(B) ๐œ๐ด๐‘š๐‘ก

(C) 2๐œ๐ด๐‘š๐‘ก

(D) 4๐œ๐ด๐‘š๐‘ก

Ans:

ฯ„t=T/2Am
โ‡’T=2Amฯ„t

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