What is Poisson ratio of concrete?

What is Poisson ratio of concrete?

Poisson’s ratio of concrete is the ratio of transverse strain to longitudinal strain in concrete specimen subjected to axial loads. The longitudinal strain and vertical strain are produced due to concrete volume reduction under compression load.

What is the equation for Young’s modulus?

Young’s modulus Y is the elastic modulus when deformation is caused by either tensile or compressive stress, and is defined by Equation 12.33. Dividing this equation by tensile strain, we obtain the expression for Young’s modulus: Y = tensile stress tensile strain = F ⊥ / A Δ L / L 0 = F ⊥ A L 0 Δ L .

Is Young’s modulus linear?

Young’s modulus represents the factor of proportionality in Hooke’s law, which relates the stress and the strain. If the range over which Hooke’s law is valid is large enough compared to the typical stress that one expects to apply to the material, the material is said to be linear.

Is Young’s modulus The modulus of elasticity?

1 Elastic modulus (Young’s modulus or modulus of elasticity) Young’s modulus describes the relative stiffness of a material, which is measured by the slope of elastic of a stress and strain graph. It is calculated by the ratio of stress value to its corresponding strain value.

How do you calculate deformation modulus?

Modulus =(σ2 – σ1) / (ε2 – ε1) where stress (σ) is force divided by the specimen’s cross-sectional area and strain (ε) is the change in length of the material divided by the material’s original gauge length.

How do you find the modulus of elasticity of soil?

The elastic modulus of the soil is taken as 2.62 MPa, and Poisson’s ratio is 0.4. The elastic modulus of permafrost is taken as 10.15 MPa, and Poisson’s ratio is 0.38. The modulus of elasticity of the ice interface is taken as 6820 MPa, and Poisson’s ratio is 0.3.

Is code for modulus of elasticity of rock?

IS 9221: Method for the determination of modulus of elasticity and Poisson’s ratio of rock materials in uniaxial compression.

Is code Mass a rock rating?

4.2 On the basis of RMR values for a given engineering structure, the rock mass should be classified as very good (rating 100-81). good (80-61), fair (60-41), poor (40-21) and very poor «20) rock mass. in IS 13365 (Part 2).

What is rock mass properties?

Rock mass property is governed by the properties of intact rock materials and of the discontinuities in the rock. The behaviour if rock mass is also influenced by the conditions the rock mass is subjected to, primarily the in situ stress and groundwater.

Is Rqd a code?

on a modified core recovery procedure, which in turn, is based indirectly on the number of fractures and the amount of softening or alteration in the rock mass as observed in the rock cores from a drill hole. RQD shall be based on IS : 11315 ( Part 11) – 1985*.