Answered: A test piece is cut from a brass bar…

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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A test piece is cut from a brass bar and subjected to a tensile test. With a load of 6.4 kN the test piece, of
diameter 11.28 mm, extends by 0.04 mm over a gauge length of 50 mm. Determine:
(i) the stress, (ii) the strain, (iii) the modulus of elasticity.
(b) A spacer is turned from the same bar. The spacer has a diameter of 28 mm and a length of 250 mm, both
measurements being made at 20~ The temperature of the spacer is then increased to 100~ the natural expansion
being entirely prevented. Taking the coefficient of linear expansion to be 18 x 10-6/~ determine:
(i) the stress in the spacer, (ii) the compressive load on the spacer.
rC.G.] [64 MN/m 2, 0.0008, 80 GN/m 2, 115.2 MN/m 2, 71 kN.]

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