Rheology quiz

Rheology is ?

• study of storage of electromagnetism

• study of people's emotion flow and change

• study of the flow and deformation of material

• an ancient greek theory on chaos and order

Weissenberg effect is associated with

• a shear thinning - material decrease in viscosity at high rates

• a rod climbing - material climbs instead of moving away with the inertia

• a yield stress - material flow only when stressed above threshold

I am a time-dependent shear thinning material. I am?

• Thixotropic

• Pseudoplastic

• Ketchup

• Chocolate

Draw a Newtonian fluid

Draw a fluid with a shear-thinning behavior :)

Answer explanation

Newtonian is proportional while shear-thinning decrease in viscosity at higher rate (therefore less stress)

G' is the ... modulus

G'' the loss modulus is associated with

• Elastic behavior

• Viscous behavior

• Liquid-like material

• Solid-like material

A stands

• in the non linear viscoelastic region

• at the critical strain point

• at the Mawell inflection point

• in the linear viscoelastic region

B stands

• in the non linear viscoelastic region

• at the critical strain point

• at the Mawell inflection point

• in the linear viscoelastic region

This is a texture map.

• A stands for rubbery

• A stands for tough

• x is the strain

• x is the strain rate