Solving for Work in a Stressed Aluminum Wire: Figure 12-56 Example

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slydg895
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hey guys i have tried this problem many times and can't figure out the answer. please help

Heres the problem:
Figure 12-56 shows the stress versus strain plot for an aluminum wire that is stretched by a machine pulling in opposite directions at the two ends of the wire. The scale of the stress axis is set by s = 5.50, in units of 10^7 N/m2. The wire has an initial length of 0.950 m and an initial cross-sectional area of 2.50 × 10^-6 m2. How much work does the force from the machine do on the wire to produce a strain of 1.90 × 10^-3?

This is my work:
W=.5(stress)(strain)(volume)
volume=(area)(lenght)
And i get .124094.

What am i doing wrong?
 

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Does anyone have any ideas?
 
slydg895 said:
Does anyone have any ideas?
It is unclear what is the Elasticity modulus or the slope of the stress - strain curve or the value of the strain at the given stress? You didn't attach a figure.
 
I have a similar problem, my elasticity modulus (stress/strain) = 7E10.