1.11 (a) 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°C. The temperature of the spacer is then increased to 100°C, the natural expansion being entirely prevented. Taking the coefficient of linear expansion to be 18 x 10-6/C determine: (i) the stress in the spacer, (ii) the compressive load on the spacer. [C.G.] [64 MN/m², 0.0008, 80 GN/m², 115.2 MN/m², 71 kN.]

1.11 (a) 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°C. The temperature of the spacer is then increased to 100°C, the natural expansion being entirely prevented. Taking the coefficient of linear expansion to be 18 x 10-6/C determine: (i) the stress in the spacer, (ii) the compressive load on the spacer. [C.G.] [64 MN/m², 0.0008, 80 GN/m², 115.2 MN/m², 71 kN.]

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

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

1.11 (a) 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°C. The temperature of the spacer is then increased to 100°C, the natural expansion
being entirely prevented. Taking the coefficient of linear expansion to be 18 x 10-6°C determine:
(i) the stress in the spacer, (ii) the compressive load on the spacer.
[C.G.] [64 MN/m², 0.0008, 80 GN/m², 115.2 MN/m², 71 kN.]

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