How do I calculate the extension and strain at peak load?

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SUMMARY

The discussion focuses on calculating strain from maximum load and extension values in a mechanical context. The strain is defined using the formula strain = ΔL / L, where ΔL represents the change in length and L is the original length. Participants suggest averaging the extension values at maximum loads of 1900 kN and 2000 kN to determine the average extension, which can then be used to calculate strain. It is emphasized that ensuring the data falls within the linear range of the stress-strain curve is crucial for accurate calculations.

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  • Familiarity with stress-strain relationships
  • Knowledge of the formula for strain calculation
  • Ability to interpret load-extension data
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  • Learn about the stress-strain curve and its significance
  • Explore methods for determining maximum load in material testing
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Homework Statement



If a question gives us a max load with different extensions, how do I calculate the strain?

For example:

1900KN=x mm
1900KN=x mm
2000KN=x mm
2000KN=x mm
2000KN=x mm
1900KN=x mm
1900KN=x mm

Homework Equations



strain= ΔL / L

The Attempt at a Solution



What I think is perhaps taking the average extension x? Is this correct? And afterwards taking x avg/ L?
 
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Hi,

Not a very specific/clear question. Would the max load be 2 MegaNewton ?
If you have the ##\Delta x## and the ##\Delta F##, you have the slope of the stress/strain curve, don't you ?
You do want to check that you are in the linear range, but perhaps that's assured by the term 'max load'.
 

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