The sanding-drum mandrel shown in the figure is made for use with a hand drill. The mandrel is made from a rubber-like material that expands when the nut is tightened to secure the sanding sleeve placed over the outside surface. If the diameter D of the mandrel increases from 1.90 in. to 2.00 in. as the nut is tightened, determine (a) the average normal strain along a diameter of the mandrel. (b) the circumferential strain at the outside surface of the mandrel. Sanding sleeve D Answers: (a) ED= (b) &c= i - Mandrel in./in. in./in.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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The sanding-drum mandrel shown in the figure is made for use with a hand drill. The mandrel is made from a rubber-like material that
expands when the nut is tightened to secure the sanding sleeve placed over the outside surface. If the diameter D of the mandrel
increases from 1.90 in. to 2.00 in. as the nut is tightened, determine
(a) the average normal strain along a diameter of the mandrel.
(b) the circumferential strain at the outside surface of the mandrel.
Sanding sleeve
Answers:
(a) ED
(b) &c=
= i
i
Mandrel
in./in.
in./in.
Transcribed Image Text:The sanding-drum mandrel shown in the figure is made for use with a hand drill. The mandrel is made from a rubber-like material that expands when the nut is tightened to secure the sanding sleeve placed over the outside surface. If the diameter D of the mandrel increases from 1.90 in. to 2.00 in. as the nut is tightened, determine (a) the average normal strain along a diameter of the mandrel. (b) the circumferential strain at the outside surface of the mandrel. Sanding sleeve Answers: (a) ED (b) &c= = i i Mandrel in./in. in./in.
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