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PolarNik [594]
2 years ago
10

on the same scale for stress, the tensile true stress-true strain curve is higher than the engineeringstress-engineering strain

curve. Explain whether this condition also holds for a compression test.
Engineering
1 answer:
Bess [88]2 years ago
5 0

Answer:

The condition does not hold for a compression test

Explanation:

For a compression test the engineering stress - strain curve is higher than the actual stress-strain curve and this is because the force needed in compression is higher than the force needed during Tension.  The higher the force in compression leads to increase in the area therefore for the same scale of stress the there is more stress on the Engineering curve making it higher than the actual curve.

<em>Hence the condition of : on the same scale for stress, the tensile true stress-true strain curve is higher than the engineering stress-engineering strain curve.</em><em> </em>does not hold for compression test

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3 years ago
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Alex_Xolod [135]

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Consider the expansion of a gas at a constant temperature in a water-cooled piston-cylinder system. The constant temperature is
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\int\limits^1_2 {- P} \, dV

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\int\limits^1_2 {- P} \, dV = \int\limits^1_2 {- \frac{n*R*T}{V}} \, dV

In this particular case as the systems is closed and the temperature constant, n, R and T are constants:

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