Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Concept explainers

Strain energy
The term strain indicates the variation in an object's length, area, and volume when the object is subjected to an external force. The external force may be of normal, shear, moment, torque, etc. The strain in an object depends on the types of external f…
Question
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The diameter (d) of a solid rod (i.e., with a circular cross-section) is 16 mm and is
made from a homogeneous material. The length (L) of the rod is 1.75 m and
Young’s Modulus for the material (E) is 250 GPa. When the rod is placed under
tension it experiences deformation and a stress (?) of 650 MPa. Calculate the
following:
(i) Strain energy (U) to 2 decimal places in Joules.
(ii) Strain energy per unit volume (U/V) in J/m3
.
(iii) The change in length ∆L to 2 decimal places in mm.
(iv) The strain (?) due to deformation to 2 significant figures

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