Answered: A bar with a solid square cross-section…

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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Question

A bar with a solid square cross-section is composed of three sections of equal length. The outer sections are made from material A and the middle section is made from material B, as shown in the figure. Assume the stress-strain curves for the particular materials used are as shown.

a. What is the change in the length of the bar if a tensile load of 112 kN is applied? The square cross-section has 2 cm sides and the length of each part is 2 m The elastic modulus of material A is 150 GPa and the elastic modulus of material B is 100 GPa.

b. When the bar in Part B is unloaded, it will have a permanent change in length. What is this permanent change in the length?

400
300
200
100
σ (MPa)
0.002
0.004
Material A
Material B
0.006
Material A

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