A circular bar of magnesium alloy is 750mm long. The stress-strain diagram for the material is shown in the figure. The bar is loaded in tension to an elongation of 6.0mm, and then the load is removed. (a)What is the permanent set of the bar? (b)If the bar is reloaded, what is the proportional limit? (High: Use the concepts illustrated in figures below)

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A circular bar of magnesium alloy is 750mm long. The stress-strain diagram for the material is shown in the figure. The bar is loaded in tension to an elongation of 6.0mm, and then the load is removed.

(a)What is the permanent set of the bar?

(b)If the bar is reloaded, what is the proportional limit?

(High: Use the concepts illustrated in figures below)

70
63
56
49
o (MPa) 42
35
28
21
14
7
0.002
0.004
0.006
0.008
0.01
Transcribed Image Text:70 63 56 49 o (MPa) 42 35 28 21 14 7 0.002 0.004 0.006 0.008 0.01
σ(MPa)
300
200
100
0.002
0.004
0.006
Transcribed Image Text:σ(MPa) 300 200 100 0.002 0.004 0.006
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