Thursday, May 16, 2013

Modulas of elasticity

Modulus of Elasticity

Young's modulus is the most common elastic modulus, sometimes called the modulus of elasticity, but there are other elastic moduli measured, too, such as the bulk modulus and the shear modulus.

definition:- it is the ratio of stress to strain
units:-psi,ksi,MPa,N/mm^2 etc.it has units of pressure in general reference.

Steel:- modulus of elasticity with different units is
29000 ksi, 200,000 MPa, 205,000N/mm^2

concrete:- modulus of elasticity depends on the weight and compressive strength  of concrete, for normal weight concrete following formula is used
                                      E= 57000 sqrt(fc')

Friday, August 24, 2012