Numerical methods & Viscoelastic models of Elastomers — Winter 2022

Define the term: Plasticity, Flow and Modulus of Rigidity.

Write the definition of Poisson’s ratio and Give the reason for Poisson’s ratio to be positive.

Discuss in detail about the Young modulus and Bulk modulus.

Avolume of 5 liters of water is compressed by a pressure of 20 atmospheres. If the bulk modulus of water is 20x108 N/M2. Find the change produced in the volume of water. Density of Mercury = 13600 kg/m3, g=9.8m/s2. Normal Atmospheric pressure = 75cm of mercury.

List out the factors affecting Glass transition temperature.

Discuss in detail about the state of aggregation.

Explain in detail about the Transition and associated properties.

Define the terms: (i) Time dependent fluid (ii) Thixotropic fluid (iii) Bingham fluid

Write a brief note on Rheopectic fluids.

Derive the relationship between viscosity and energy dissipation.

Write the importance of Newtonian fluid.

Give the difference between Newtonian fluid and Bingham plastic fluid.

Explain the different kinds of behavior of Thixotropic fluid and Rheopectic fluids in detail.

Write a brief note on Newton’s model.

Derive the stress relaxation experiment equation for Maxwell model.

Derive the equation of Creep experiment for Voigt model.

Explain a brief note on Deborah number.

Give the broad classification of polymeric material based on mechanical behavior.

Derive the equation of Creep experiment for Maxwell model.

Write about the structure of an Ideal Rubber

List out the factors affecting viscosity.

Short note on “Capillary Viscometer”.

“Molecular weight affect the viscosity of Liquid” justify the statement.

Write a brief note on Viscosity and its nomenclature.

Discuss in detail about the elasticity of network.