4.We want to draw a 7.5 mm diameter copper wire having a yield strength of 140 MN.m²²into a 6 mm diameter wire. Will the drawn wire break during the drawing process?Strength (MN.m-2)60050040030020010000Tensile strength20Yield strength% Elongation6040Percent cold work80100908070605040302010100% Elongation

Given: The initial diameter of copper wire di=7.5 mm The yield strength of copper wire σy=140 MNm2…

Answered: We want to draw a 7.5 mm diameter…

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

4.
We want to draw a 7.5 mm diameter copper wire having a yield strength of 140 MN.m²²
into a 6 mm diameter wire. Will the drawn wire break during the drawing process?
Strength (MN.m-2)
600
500
400
300
200
100
0
0
Tensile strength
20
Yield strength
% Elongation
60
40
Percent cold work
80
100
90
80
70
60
50
40
30
20
10
100
% Elongation

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why use yield strength not tensile strength? You are drawing wire which you want the wire to elongate pernamently, and not return back to original shape .

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