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Problem with work

  • Thread starter slydg895
  • Start date
6
0
hey guys i have tried this problem many times and cant 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?
 

Answers and Replies

6
0
Does anyone have any ideas?
 
PhanthomJay
Science Advisor
Homework Helper
Gold Member
7,119
463
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.
 
2
0
I have a similar problem, my elasticity modulus (stress/strain) = 7E10.
 

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