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

  • Thread starter Thread starter slydg895
  • Start date Start date
  • Tags Tags
    Work
AI Thread Summary
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.
slydg895
Messages
6
Reaction score
0
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?
 
Physics news on Phys.org
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.
 
Thread 'Struggling to make relation between elastic force and height'
Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Back
Top