Question

comparison between modulus of elasticity and modulus of rigidity ( write maximum 6 points )​

Answer 1

Answer:

Step-by-step explanation:

Difference Between Modulus of Elasticity and Modulus of Rigidity

Direction of Force

Modulus of elasticity is used to calculate the deformation of an object when a deforming force acts at right angles to a surface of the object.

Modulus of rigidity is used to calculate deformations when a deforming force acts parallel to the surface of an object.

Change in Shape

Where modulus of elasticity is calculated, the object under the deforming force either gets lengthened or shortened.

Where modulus of rigidity is calculated, one of the surfaces of the object becomes displaced with respect to another surface.

Relative Size

For most materials, the modulus of elasticity is larger than the modulus of rigidity. The exceptions to this rule are the so-called “auxetic” materials which have negative Poisson’s ratios, but these materials are less common.