+1 vote
in Machine Design by (86.7k points)
The transverse shear stress at the root of the threads in the nut can be given by?(symbols have their usual meaning, z=number of threads in nut)

(a) 4W/πdz²

(b) W/πdtz

(c) 4W/πtd²

(d) None of the mentioned

This question appeared in my semester exam.

I would like to ask this question from the Screw Jack section in lesson Threaded Joints of Machine Design

1 Answer

0 votes
ago by (48.2k points)
Suitable answer is (b) W/πdtz

Unravel the mysteries with: At root of threads, the area parallel to direction of force is considered which is equal to circumference x thickness x  no. of threads.

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