Answered: between a ductile and brittle material…

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)Draw the stress-strain curve of a ductile material such as that of a ductile steel and discuss the
various regions of the curve. Explain the difference between a ductile and brittle material and the
concept of ductility and its measurement.

b)A machine part 10 mm thick, having the dimensions shown in the figure, is to be subjected to
cyclic loading. If the maximum stress is limited to 60 MPa, determine the allowable force P.
Approximate the stress concentration factors form the graph given. Where might a potential
fracture occur?

8 mm
60 mm
40 mm
P
24 mm
3.0
3.2
2.8
2.6
3.0
N-
N
ht
2.4
2.8
2.2
K
= 4.0.
O avg
(w – 2r)t
K
2.6
2.0
= 3,0
h
- 2.0-
1.8
= 1.5,
1.6
1.2-
2.4
1.4
2.2
1.2
1.0
2.0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0.1
0.2
2r
0.3
0.4
0.5
h

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