Variation of youngs modulus with temperature

[Himal kharel]

Does youngs modulus of elasticity depend upon temperature?

 

[edgepflow]

Yes, see this link:

http://www.engineeringtoolbox.com/young-modulus-d_773.html

 

[Himal kharel]

But why??

 

[Mapes]

But why??

Roughly, the force holding atoms together in bonds decreases as the bond length increases, which happens during thermal expansion. This force is the origin of the macro-scale elastic modulus.