Answered: The smallest allowable outer diameter d…

Engineering

Mechanical Engineering

The smallest allowable outer diameter d of the washers is mm.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Metrology of Screw Threads

Screw threads are a series of ridges having the profile of a helix. This helix profile runs continuously along the length of a uniform solid or a hollow bar of a circular cross-section at periodic intervals. These helix ridges are also formed over a conical bar. These continuous helical ridges are termed threads.

Question

Three wooden planks are fastened together by a series of bolts to form a column. The diameter of each bolt is 12-mm and the inner
diameter of each washer is 16-mm, which is slightly larger than the diameter of the holes in the planks. Determine the smallest
allowable outer diameter d of the washers, knowing that the average normal stress in the bolts is 33 MPa and that the bearing stress
between the washers and the planks must not exceed 8.5 MPa.
II
11
11
I
I
+
1
11
1
T
I
11
12 mm
The smallest allowable outer diameter d of the washers is
mm.

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