Dynamic Mechanical Testing Viscoelastic Material Response Phase angle 0°<8<90 Strain Stress G*1=Yo Complex Parameters their Components G*=G'+iG" Complex Storage Loss Modulus Modulus Modulus G★ Real Root Imaginary Root G tan 8 =G"/G' Dairy Products ·Fluid Milk Cultured Dairy Products cottage cheese cheese yogurt sour cream etc. Ice Cream 55 Dynamic Mechanical Testing Viscoelastic Material Response Phase angle 0° < δ < 90° Strain Stress |G*| = σο/γο γο σο Complex Parameters & their Components G* G' G" tan δ = G"/G' G* = G' + iG" Complex Modulus Storage Modulus Loss Modulus Real Root Imaginary Root δ Dairy Products • Fluid Milk • Cultured Dairy Products cottage cheese cheese yogurt sour cream etc. • Ice Cream