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

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The discussion revolves around solving a physics problem related to the work done on a stressed aluminum wire, as depicted in a referenced figure. The user has attempted to calculate the work using the formula W = 0.5(stress)(strain)(volume) but is uncertain about their results. Key points of confusion include the elasticity modulus, the slope of the stress-strain curve, and the specific values for stress and strain. Additional insights from other users mention similar problems and provide a modulus value of 7E10 for reference. Clarifying these parameters is essential for accurately solving the problem.
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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.
 

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