Question

Relation between temperature and young modulas​

Answer 1

Answer:

By increasing temperature up to a special value which is around 400 K, Young's modulus decreases appreciably.

For the temperatures higher than 400 K, Young's modulus decreases with a lower rate and tends to be constant at high temperatures.

Explanation:

As the temperature increases, the Young's modulus decreases almost linearly up to the quartz transition at 573 °C.

Then the Young's modulus strongly increases up to the test temperature (700 °C).Young's modulus increases on cooling after the second and third thermal cycles.

Answer 2

Answer:

When the temperature increases, the atomic thermal vibrations increase, and this will cause the changes of lattice potential energy and curvature of the potential energy curve, so the Young's modulus will also change. And with the increase of temperature, the material will have a volume expansion.

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