Question

As increse in elastic modulus, strenght of the material will?

Answer 1

It depends upon the definition of ‘Elastic’. If by elastic you mean more stretchable then ‘NO’. The best example is a rubber band. For a small load you can stretch it a long way, but if you increase the load it will tear. On the other hand for a steel wire of same dimensions if you apply the same load then you will hardly see any difference. A large amount of force will be required to produce any significant dimension change in it, but you won’t see the same extent of stretching as in case of a rubber band. Hence a rubber band is more elastic than a steel wire according to the above theory.

But In engineering, elasticity (Young’s Modulus) means how stiff a material is (i.e. how much it can resist plastic deformation). The more the value of young’s modulus, more force is required to deform it. Hence a material with higher young’s modulus is more elastic than a material with lower young’s modulus. (i.e steel is more elastic than rubber).

FYI

Young’s Modulus of Steel : 210 GPa

Young’s Modulus of Rubber : 0.1 GPa