Question

The three basic properties which describe the rheological behaviour of material are its elasticity, viscosity and

• A. Plasticity
• B. Thermal conductivity
• C. Thermal diffusivity
• D. Terminal velocity

Hint:

Remember the rheological triumvirate: Elasticity (solid), Viscosity (liquid), and Plasticity (yield behavior).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Classical continuum mechanics and rheology model the mechanical response of materials using three fundamental ideal behaviors.

Step 2: Detailed Explanation:
The three primary classical rheological properties are:
1. Elasticity (Hookean solid: reversible deformation proportional to stress)
2. Viscosity (Newtonian fluid: rate of flow proportional to shear stress)
3. Plasticity (St. Venant body: permanent deformation once a critical yield stress is exceeded)
Real foods exhibit combinations of these three behaviors (e.g., viscoelasticity and viscoplasticity).

Step 3: Final Answer:
Therefore, the three basic rheological properties are elasticity, viscosity, and plasticity.